4660_Nereus Planning


Background

Nereus is the most accessible kilometer-sized object known and a leading candidate for exploration by spacecraft. Its delta-V for rendezvous is smaller than the Moon's and also smaller than that for any other asteroid with H less than 19.5 mag, that is, with diameter greater than about 0.46 km. It presents frequent mission opportunities and was at one point the prime target for both the Japanese-U.S. Muses-C sample-return mission and Spacedev's Near-Earth Asteroid Prospector (NEAP) Mission. Reliable determination of the object's spectral class has proven difficult.

We detected Nereus echoes (cw, ranging, and coarse imaging) at Arecibo in Dec. 2001.

We plan high-resolution imaging at Arecibo during Jan. 9-14 and at Goldstone during Jan. 15-29, to ensure thorough orientational coverage of the object.

The Goldstone tracks cover Nereus's 0.029-AU approach. This is its closest approach until 2060, so our experiment is critical.

Orbital and Physical Characteristics

    orbit type             Apollo       
    semimajor axis         1.490 AU     
    eccentricity           0.360        
    inclination            1.424°       
    perihelion dist.       0.953 AU     
    aphelion dist.         2.026 AU     
    abs. mag. (H)         18.2 mag      
    diameter             0.7 to 1.5 km  
    rotation period      15.1 +/- 1.2 h 
    lightcurve amp.        0.9 mag   
    spectral class         unknown      

Nereus's 0.029-AU approach in Jan. 2002 is its closest until 2060.




Discovery

					  Circular No. 3675
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM     Telephone 617-864-5758

...

1982 DB
Another fast-moving asteroidal object has been discovered by E.
Helin with the 1.2-m Palomar Schmidt telescope.  Positions are:

1982 UT             R. A. (1950) Decl.       Mag.   Observer
Feb. 28.45764    13 45 42.48   -18 20 07.8   16     Helin
  28.49236    13 45 36.17   -18 19 48.1            "
Mar.  4.43672    13 36.0       -17 40        16     Bowell

E. Helin and E. Shoemaker (Palomar Observatory).  Measurers: Helin
and R. S. Dunbar.
E. Bowell (Lowell Observatory, Anderson Mesa station).
...
1982 March 5                   (3675)              Brian G. Marsden


Tracks

                                                   
ARECIBO

                                                    Duration  Rotation
Jan      UTC         AST     RA   Dec  AU    RunSNR    (h)      (°)    
09    1846-2042   1446-1642  337   4  0.050    720    1.93       46
10    1840-2027   1440-1627  335   3  0.047    860    1.78       42
11    1825-2012   1425-1612  333   3  0.045    990    1.78       42
12    1819-1957   1419-1557  331   2  0.042   1100    1.63       39
13    1813-1933   1413-1533  328   1  0.040   1300    1.33       32
14    1807-1909   1407-1509  325  -0  0.038   1400    1.03       25

GOLDSTONE

         UTC         PST
15    1730-2205   0930-1405  321  -1  0.036    100    4.58      109
18    1645-0005   0845-1605  308  -6  0.031    170    7.33      175
19    1630-2335   0830-1535  303  -8  0.030    190    7.08      169
20    1635-2300   0835-1500  298 -10  0.029    200    6.42      153
22    1530-2005   0730-1205  286 -13  0.029    210    4.58      109
23    1505-1950   0705-1150  280 -15  0.029    200    4.75      113
24    1445-1730   0645-0930  274 -16  0.030    190    2.75       66
25    1425-1855   0625-1055  268 -17  0.031    170    4.50      107
26    1405-1915   0605-1115  263 -18  0.032    150    5.17      123
27    1345-1910   0545-1110  258 -19  0.033    120    5.42      129
29    1315-1830   0515-1030  250 -20  0.037     88    5.25      125



NEREUS ROTATION PHASE COVERAGE This assumes P = 15.1 hours and it ignores contributions due to sky motion. Arecibo: December 18-20 Arecibo: January 9-13 Goldstone: January 15-22 Goldstone: January 23-29

Uncertainties (From Jon Giorgini)

2001 Dec 11, 01 10:49:47 AM
For new solution #18, with 244 obs 1981-Sep-30 to 2001-Dec-10, 
3-sigma uncertainties are:

      DATE          Pointing  S-band Dop     Delay  
                      (")         Hz         (sec)  
-----------------  ---------  ----------  ----------
18-DEC-2001 00:00      1.467     < 1.000    0.002200
19-DEC-2001 00:00      1.559     < 1.000    0.002210
20-DEC-2001 00:00      1.658     < 1.000    0.002220

-----------------------------------------------------

2002 Jan 03
With a single Doppler, two delays, and additional optical data now
spanning 1981-Sep-30 to 2002-Jan-2, solution #24 has these
3-standard-deviation S-band uncertainties:

      DATE          Pointing  S-band Dop     Delay  
                      (")         Hz         (sec)  
-----------------  ---------  ----------  ----------
 8-JAN-2002 00:00      1.627      <1.000    0.000046
10-JAN-2002 00:00      1.860      <1.000    0.000067
12-JAN-2002 00:00      2.128      <1.000    0.000097

-----------------------------------------------------

2002 Jan 10
   Using the solution #26 Steve generated, with 277 optical
obs from (Sep 30, 1981 to Jan 2, 2002), 3 delay and one Doppler,
3-sigma X-band uncertainties are shown below.

   OSOD/files have been established at Goldstone (intruder).

      DATE          Pointing  X-band Dop     Delay  
                      (")         Hz         (sec)  
-----------------  ---------  ----------  ----------
 8-JAN-2002 00:00      1.627      <1.000    0.000046
10-JAN-2002 00:00      1.337      <1.000    0.000012
12-JAN-2002 00:00      1.522      <1.000    0.000023
14-JAN-2002 00:00      1.731      <1.000    0.000041
16-JAN-2002 00:00      1.954      <1.000    0.000068
18-JAN-2002 00:00      2.162      <1.000    0.000102
20-JAN-2002 00:00      2.289      <1.000    0.000143
22-JAN-2002 00:00      2.287      <1.000    0.000187
24-JAN-2002 00:00      2.166      <1.000    0.000225
26-JAN-2002 00:00      1.976      <1.000    0.000254
28-JAN-2002 00:00      1.796      <1.000    0.000273
30-JAN-2002 00:00      1.641      <1.000    0.000284
-----------------------------------------------------
  With 282 optical observations spanning 30-SEP-1981 to 4-JAN-2002
5 delay and 2 Doppler, 4660 Nereus solution #30 was computed. 3-sigma
X-band uncertainties are shown below. Files have been updated
at Goldstone and Arecibo.

   Note TPM prediction error is one of the uncalibrated error 
sources not included in these uncertainty predictions. This is why 
Doppler error is sometimes replaced by "<1.000" Hz when it gets
very small. Here I left it.

      DATE          Pointing  X-band Dop     Delay  
                      (")         Hz         (sec)  
-----------------  ---------  ----------  ----------
 8-JAN-2002 00:00      1.331       0.178    0.000040
10-JAN-2002 00:00      1.157       0.130    0.000012
12-JAN-2002 00:00      1.084       0.124    0.000004
14-JAN-2002 00:00      1.227       0.133    0.000013
16-JAN-2002 00:00      1.385       0.157    0.000027
18-JAN-2002 00:00      1.540       0.194    0.000045
20-JAN-2002 00:00      1.654       0.240    0.000066
22-JAN-2002 00:00      1.691       0.283    0.000089
24-JAN-2002 00:00      1.647       0.315    0.000110
26-JAN-2002 00:00      1.536       0.330    0.000127
28-JAN-2002 00:00      1.408       0.328    0.000138

Setups

We will start with solution 38

CW setup:           

TX polarization           RCP
RCV polarization          LCP
Frequencies:              2
Dwell:                    15 seconds
Bandwidth:                2000 Hz
Sampling interval:        5000 x 0.1 usec
VME FFT for PSD files:    4096 for 0.48828125-Hz resolution


Possible ranging setups:
---------------------------------------------------------------------------
127 x 64 10-usec single sample

baud            10 usec
code            127
gates           127
FFT             64
CLT             11
ncoh            2
bandwidth       394 Hz   
resolution      6.15 Hz
TXOFF           TBD
incoh sums      64 => 10.4 sec/record
---------------------------------------------------------------------------
127 x 64 11-usec single sample.

baud            11 usec
code            127
gates           127
PRP             1397
FFT             64
CLT             11
ncoh            2
bandwidth       357.9 Hz   
resolution      5.59 Hz
TXOFF           TBD
-------------------------------------------------------------------------
0.125-usec ranging

setup           JX1XS001  
baud            0.125 usec
code            127
gates           127
FFT             64
ncoh            1968
bandwidth       32.008 Hz     
resolution      0.5001 Hz
TXOFF           6 Hz = 12 cells, => cell 44
incoh sums      4 looks=> 8 sec/record => expect records per run ~ RTT/8
CLT gate        34.8
_____________________________________________________________________
POSSIBLE RANGING SETUPS: (code=127, FFT=64, single-pol'n) 
   These are from JX, w/ max-band (min-acc) options from Ray Jurgens.
   Currently configured for 5-sec records.
_______________________________________________________________________
 Setup        Baud        RP         1-acc 1-acc      
            usec   m      usec        band   res    acc  band     res 
_______________________________________________________________________
 
JX1XS110  11.000 1650    1397.0      715.8  11.2      2   358     5.6
JX1XS070   7.000 1050     889.0     1124.9  17.6      3   375     5.9
                                                      
JX1XS020   2.000  300     254.0     3937.0  61.5     12   328     5.1
                                                      4   984    15.4 

JX1XS010   1.000  150     127.0     7874.0 123.0     41   192     3.0 
                                                      8   984    15.4 

JX1XS005   0.500   75      63.5    15748.0 246.1    123   128     2.0 
                                                     15  1050    16.4 

JX1XS002   0.250   37.5    31.75   31496.1 492.1    492    64     1.0
                                                     30  1050    16.4 
 
JX1XS001   0.125   18.75   15.875  62992.1 984.3   1970    32     0.5 
                                                     60  1050    16.4 
____________________________________________________________________
RANGING SETUPS from Toutatis 1992: (code=255, FFT=256, 1 channel)
____________________________________________________________________
Setup     Baud   NACC       bandwidth  resolution   1/res'n   nom
                               Hz         Hz          sec     gate
____________________________________________________________________

TU1XS01   0.125    123      255.06      0.9963        1.00    34
                   890       35.25      0.1377        7.26
                  1471       21.327     0.08331      12.00
                  2210       14.196     0.05545      18.03
                  2942       10.664     0.04166      24.01
                  3309        9.4810    0.03704      27.00
                  3700        8.4791    0.03312      30.19
                  7400        4.2395    0.01656      60.38
                 14800        2.1198    0.00828     120.77
                     
TU1XS02   0.25     123      127.5       0.498    
TU1XS04   0.500    307       25.5       0.100      
TU1XS08   1.000    153       25.6       0.100      
TU1XS16   2.000      4      490.2       1.915     
TU1XS32   4.000      2      490.2       1.915      
TU1XS33   4.125      2      475.3       1.857      
TU1XS80  10.000      1      392.2       1.532                 11      
TU1XS88  11.000      1      356.5       1.393                 11 


Instructions

NOTE: Data should be moved to the appropriate subdirectories in intruder:/d1/4660_Nereus/raw/

4660_Nereus POINTING:

For these observations, we need the following files:

  EPH.OUT.s38              (pointing predicts)
  PRDX.OUT.s38 
  PUNCH.OUT.s38    

These files were created in:	    intruder:/data/osod/ops/4660_Nereus
have been copied to:                intruder:/d1/4660_Nereus/support/

POINTING  

January 15
                                                  TX Offsets    
Date (UTC)   DOY  hhmmss    RA      Dec   Macro  LHA      Dec    RTT  OSOD      
2002 01 15   015  170000 321.9079 -1.2244   A                    36.3  26
2002 01 15   015  180000 321.7483 -1.2795   A                    36.2
2002 01 15   015  190000 321.5849 -1.3349   A                    36.1
2002 01 15   015  200000 321.4182 -1.3905   A   0.0017  -0.0006  36.0
2002 01 15   015  210000 321.2493 -1.4463   A                    35.9
2002 01 15   015  220000 321.0790 -1.5022   A                    35.8
2002 01 15   015  230000 320.9084 -1.5584   A                    35.8


January 18
                                                  TX Offsets    
Date (UTC)   DOY  hhmmss    RA      Dec   Macro  LHA      Dec    RTT  OSOD      
2002 01 18   018  160000 309.2024 -5.7529  A                     31.5  26
2002 01 18   018  170000 308.9876 -5.8265  A                     31.4
2002 01 18   018  180000 308.7683 -5.9000  A   0.0019  -0.0007   31.4
2002 01 18   018  190000 308.5455 -5.9734  A B                   31.3
2002 01 18   018  200000 308.3202 -6.0466  A B                   31.2
2002 01 18   018  210000 308.0935 -6.1195    B                   31.2
2002 01 18   018  220000 307.8667 -6.1920    B 0.0020  -0.0007   31.1
2002 01 18   018  230000 307.6408 -6.2643    B                   31.1
2002 01 19   019  000000 307.4170 -6.3363    B                   31.1
2002 01 19   019  010000 307.1961 -6.4082    B                   31.0


January 19
                                                  TX Offsets    
Date (UTC)   DOY  hhmmss    RA      Dec   Macro  LHA      Dec    RTT  OSOD      
2002 01 19   019  160000 304.0391 -7.5294   A                    30.4  26
2002 01 19   019  170000 303.8050 -7.6070   A                    30.3
2002 01 19   019  180000 303.5668 -7.6843   A  0.0020  -0.0006   30.3
2002 01 19   019  190000 303.3255 -7.7612   A                    30.2
2002 01 19   019  200000 303.0821 -7.8376   AB                   30.2
2002 01 19   019  210000 302.8379 -7.9135    B                   30.1
2002 01 19   019  220000 302.5942 -7.9888    B 0.0020  -0.0006   30.1
2002 01 19   019  230000 302.3521 -8.0636    B                   30.1
2002 01 20   020  000000 302.1126 -8.1380    B                   30.1


January 20
                                                  TX Offsets    
Date (UTC)   DOY  hhmmss    RA      Dec   Macro  LHA      Dec    RTT  OSOD      
2002 01 20   020  160000 298.4875 -9.3671   A                    29.5  26
2002 01 20   020  170000 298.2369 -9.4463   A   0.0021  -0.0006  29.5
2002 01 20   020  180000 297.9825 -9.5249   AB                   29.5
2002 01 20   020  190000 297.7256 -9.6027    BC 0.0021  -0.0007  29.5
2002 01 20   020  200000 297.4673 -9.6798    BC                  29.4
2002 01 20   020  210000 297.2089 -9.7561     C 0.0021  -0.0006  29.4
2002 01 20   020  220000 296.9518 -9.8315     C                  29.4
2002 01 20   020  230000 296.6970 -9.9063     C                  29.4


January 22  (CLOSEST APPROACH)
                                                  TX Offsets    
Date (UTC)   DOY  hhmmss    RA      Dec   Macro  LHA      Dec    RTT  OSOD      
2002 01 22   022  150000 286.8485 -12.8933  A                    29.0  26
2002 01 22   022  160000 286.5826 -12.9675  A   0.0022  -0.0006  29.0
2002 01 22   022  170000 286.3133 -13.0407  AB                   28.9
2002 01 22   022  180000 286.0417 -13.1126   B  0.0022  -0.0006  28.9
2002 01 22   022  190000 285.7691 -13.1832   BC                  29.0
2002 01 22   022  200000 285.4967 -13.2525    C 0.0022  -0.0005  29.0
2002 01 22   022  210000 285.2260 -13.3204    C                  29.0


January 23 
                                                  TX Offsets    
Date (UTC)   DOY  hhmmss    RA      Dec   Macro  LHA      Dec    RTT  OSOD   
2002 01 23   023  150000 280.7541 -14.5250  A                    29.2  26
2002 01 23   023  160000 280.4876 -14.5922  A   0.0021  -0.0006  29.2
2002 01 23   023  170000 280.2184 -14.6581  AB                   29.2
2002 01 23   023  180000 279.9477 -14.7225   B  0.0022  -0.0005  29.2
2002 01 23   023  190000 279.6769 -14.7853   BC                  29.2
2002 01 23   023  200000 279.4073 -14.8465    C 0.0022  -0.0005  29.2
2002 01 23   023  210000 279.1401 -14.9063    C                  29.3


January 24 
                                                  TX Offsets    
Date (UTC)   DOY  hhmmss    RA      Dec   Macro  LHA      Dec    RTT  OSOD   
2002 01 24   024  140000 275.0105 -15.9081  A                    29.7  26
2002 01 24   024  150000 274.7526 -15.9676  A                    29.7
2002 01 24   024  160000 274.4918 -16.0259  A 0.0022  -0.0005    29.7
2002 01 24   024  170000 274.2291 -16.0826  A                    29.8
2002 01 24   024  180000 273.9658 -16.1377  A                    29.8


January 25
                                                  TX Offsets    
Date (UTC)   DOY  hhmmss    RA      Dec   Macro  LHA      Dec    RTT  OSOD   
2002 01 25   025  140000 269.2255 -17.1417   A                   30.6  26
2002 01 25   025  150000 268.9782 -17.1917   A                   30.6
2002 01 25   025  160000 268.7286 -17.2402   A                   30.6
2002 01 25   025  170000 268.4779 -17.2870   A 0.0021  -0.0004   30.7
2002 01 25   025  180000 268.2273 -17.3321   A                   30.7
2002 01 25   025  190000 267.9783 -17.3754   A                   30.8
2002 01 25   025  200000 267.7318 -17.4172   A                   30.8

January 26
                                                  TX Offsets    
Date (UTC)   DOY  hhmmss    RA      Dec   Macro  LHA      Dec    RTT  OSOD   
2002 01 26   026  140000 263.7688 -18.1513   A                   31.7  26
2002 01 26   026  150000 263.5360 -18.1917   A                   31.8
2002 01 26   026  160000 263.3017 -18.2306   A                   31.8
2002 01 26   026  170000 263.0669 -18.2678   A 0.0020  -0.0003   31.9
2002 01 26   026  180000 262.8330 -18.3032   A                   31.9
2002 01 26   026  190000 262.6011 -18.3369   A                   32.0
2002 01 26   026  200000 262.3724 -18.3691   A                   32.0


January 27
                                                  TX Offsets    
Date (UTC)   DOY  hhmmss    RA      Dec   Macro  LHA      Dec    RTT  OSOD   
2002 01 27   027  130000 258.9239 -18.9169   A                   33.1  26
2002 01 27   027  140000 258.7103 -18.9499   A                   33.1
2002 01 27   027  150000 258.4946 -18.9816   A                   33.2
2002 01 27   027  160000 258.2780 -19.0117   A 0.0020  -0.0003   33.2
2002 01 27   027  170000 258.0615 -19.0402   A                   33.3
2002 01 27   027  180000 257.8463 -19.0669   A                   33.4
2002 01 27   027  190000 257.6337 -19.0921   A                   33.4


January 29
                                                  TX Offsets    
Date (UTC)   DOY  hhmmss    RA      Dec   Macro  LHA      Dec    RTT  OSOD   
2002 01 29   029  130000 250.0728 -20.0016   A                   36.5  26
2002 01 29   029  140000 249.8946 -20.0208   A                   36.5
2002 01 29   029  150000 249.7151 -20.0387   A                   36.6
2002 01 29   029  160000 249.5356 -20.0551   A 0.0019  -0.0001   36.7
2002 01 29   029  170000 249.3570 -20.0699   A                   36.8
2002 01 29   029  180000 249.1804 -20.0833   A                   36.9
2002 01 29   029  190000 249.0067 -20.0955   A                   37.0


PRDX (DELAY-DOPPLER EPHEMERIDES)

PRDX.OUT.s38
TRANSMITTER: STATION #14,     RECEIVER: STATION #14
RECEIVER    U.T.         RANGE         DOPPLER      LHA      DEC      RA      EL    
 2002 JAN 29 13:10     36.4854519761  -173854.811 319.1753 -20.0048 250.043  22.403 
 2002 JAN 29 13:20     36.4976662712  -174664.016 321.7118 -20.0080 250.014  23.745 
 2002 JAN 29 13:30     36.5099381633  -175498.073 324.2483 -20.0112 249.984  25.026 
 2002 JAN 29 13:40     36.5222693525  -176355.556 326.7849 -20.0144 249.954  26.243 
 2002 JAN 29 13:50     36.5346614220  -177234.992 329.3215 -20.0176 249.924  27.391 
 2002 JAN 29 14:00     36.5471158576  -178134.866 331.8582 -20.0207 249.895  28.468 
 2002 JAN 29 14:10     36.5596340379  -179053.621 334.3949 -20.0238 249.865  29.468 
 2002 JAN 29 14:20     36.5722172384  -179989.664 336.9316 -20.0268 249.835  30.389 
 2002 JAN 29 14:30     36.5848665987  -180941.366 339.4684 -20.0298 249.805  31.226 
 2002 JAN 29 14:40     36.5975831739  -181907.068 342.0051 -20.0328 249.775  31.975 
 2002 JAN 29 14:50     36.6103678789  -182885.083 344.5419 -20.0357 249.745  32.634 
 2002 JAN 29 15:00     36.6232215167  -183873.699 347.0787 -20.0386 249.715  33.198 
 2002 JAN 29 15:10     36.6361447780  -184871.185 349.6155 -20.0414 249.685  33.665 
 2002 JAN 29 15:20     36.6491382074  -185875.791 352.1523 -20.0442 249.655  34.033 
 2002 JAN 29 15:30     36.6622022579  -186885.751 354.6891 -20.0469 249.625  34.299 
 2002 JAN 29 15:40     36.6753372273  -187899.291 357.2258 -20.0497 249.595  34.462 
 2002 JAN 29 15:50     36.6885433194  -188914.629 359.7626 -20.0523 249.565  34.521 
 2002 JAN 29 16:00     36.7018205901  -189929.979   2.2993 -20.0549 249.536  34.476 
 2002 JAN 29 16:10     36.7151689776  -190943.556   4.8360 -20.0575 249.506  34.327 
 2002 JAN 29 16:20     36.7285882949  -191953.575   7.3727 -20.0601 249.476  34.075 
 2002 JAN 29 16:30     36.7420782305  -192958.263   9.9093 -20.0626 249.446  33.721 
 2002 JAN 29 16:40     36.7556383565  -193955.853  12.4459 -20.0650 249.416  33.268 
 2002 JAN 29 16:50     36.7692680982  -194944.595  14.9825 -20.0674 249.387  32.716 
 2002 JAN 29 17:00     36.7829667901  -195922.754  17.5190 -20.0698 249.357  32.071 
 2002 JAN 29 17:10     36.7967336225  -196888.618  20.0554 -20.0721 249.327  31.334 
 2002 JAN 29 17:20     36.8105676739  -197840.497  22.5918 -20.0744 249.298  30.509 
 2002 JAN 29 17:30     36.8244679057  -198776.730  25.1281 -20.0767 249.268  29.600 
 2002 JAN 29 17:40     36.8384331638  -199695.686  27.6644 -20.0789 249.239  28.610 
 2002 JAN 29 17:50     36.8524621886  -200595.769  30.2006 -20.0811 249.210  27.544 
 2002 JAN 29 18:00     36.8665535945  -201475.419  32.7367 -20.0832 249.180  26.405 
 2002 JAN 29 18:10     36.8807058956  -202333.117  35.2727 -20.0853 249.151  25.198 
 2002 JAN 29 18:20     36.8949175010  -203167.386  37.8086 -20.0874 249.122  23.926 
 2002 JAN 29 18:30     36.9091867180  -203976.796  40.3445 -20.0894 249.093  22.592 


Arecibo TX windows' phase coverage Rotation Phase 0 90 180 270 360 Jan | | | | | 9 ..........................######..... 9 10 ...........######.................... 10 11 ###..............................#### 11 12 ..................######............. 12 13 ...######............................ 13
ARECIBO MASTERLOG Last updated: 2005 May 03 Comment from Benner 070828: The dimensions of the Arecibo images are all 81 rows x 81 columns, where each image has a resolution of 0.1 usec x 0.0143 Hz (except for Dec. 20, which has a resolution of 0.5 usec x 0.03 Hz) Date Setup Runs OSOD TXoff AST UTC ---------------------------------------------------------------------------- Dec 18 RI cw 5 kHz 3 18 +200 172232-173249 212232-213249 RI 1023x4 1 18 173853-174035 213853-214035 RI 8191x4 1 18 174252-174434 214252-214434 datafile.18dec01.r1541.2 has cw data but was cabled for 4.0 us 1023 code --> NO GOOD -------------------------------------------------------------------------- Dec 19 CBR 16383x0.5 3 18 +2 191234-192316 231234-232316 -------------------------------------------------------------------------- Dec 20 CBR 65535x0.5 11 18 +2 184149-191805 224149-231805 handwritten log sheet indicates the RI and GIO were used (written from memory by Mike Nolan on 2002 Jan. 2)
Dec 20 0.5 usec x 0.03 Hz 7-run sum -------------------------------------------------------------------------- Jan 09 RI 8191x4 1 24 +2 144604-144647 184604-184647 RI 1023x4 1 24 +2 144903-144946 184903-184946 RI cw 5 kHz 16 24 +200 145245-152207 185245-192207 RI cw 5 kHz 1 26 +200 152532-152616 192532-192616 CBR 65535x0.1 37 26 +5 152749-163531 192749-203531 Jan 09 CW 5-run sum Jan 09 0.1 usec x 0.014 Hz collage -------------------------------------------------------------------------- Jan 10 RI cw 5 kHz 5 26 +200 144846-145600 184846-185600 CBR 65535x0.1 51 26 +5 145904-162126 185904-202126 Jan 10 CW 5-run sum Jan 10 0.1 usec x 0.014 Hz collage -------------------------------------------------------------------------- Jan 11 RI cw 5 kHz 5 26 +200 142732-143419 182732-183419 CBR 65535x0.1 58 26 +5 143616-160419 183616-200419 Jan 11 CW 5-run sum Jan 11 0.1 usec x 0.014 Hz collage -------------------------------------------------------------------------- Jan 12 RI cw 5 kHz 5 30 +200 142129-142758 182129-182758 CBR cw 5 kHz 8 30 +200 143544-144805 183544-184805 CBR 65535x0.1 38 30 +5 144957-154450 184957-194450 Jan 12 CW 5-run sum For the second set of CW observation on January 12, the CBR was running but coding was not turned on. Jan 12 0.1 usec x 0.014 Hz collage -------------------------------------------------------------------------- Jan 13 RI cw 5 kHz 5 30 +200 141143-141754 181143-181754 CBR 65535x0.1 16 30 +5 141951-144126 181951-184126 Jan 13 CW 5-run sum Jan 13 0.1 usec x 0.014 Hz collage --------------------------------------------------------------------------
GOLDSTONE MASTERLOG RCV file setup runs start -stop osod OFFSET TX Poln --------------------------------------------------------------------------------------------------- January 15 (DOY 015) PSD02015RCP.4660_Nereus, VOLT02015RCP.4660_Nereus CW 2 kHz 4096 FFT 10 173321-174504 30 none RCP PSD02015LCP.4660_Nereus, VOLT02015LCP.4660_Nereus CW 2 kHz 4096 FFT 10 174711-175855 30 none LCP ne01503 10 us x 6.15 Hz 127 code 5 181717-181955 30 +30 RCP ne01506 1 us x 3.0 Hz 127 code 3 183207-183513 30 +30 RCP 465 kW ne01509 1/8 us x 1/4 Hz 127 code 12 190228-191753 30 +8 RCP 452 kW ne01510 1/8 us x 1/4 Hz 127 code 16 193214-195257 32 +8 RCP also sampling w/PFS ne01511 1/8 us x 1/4 Hz 127 code 7 195843-200722 32 +8 RCP sample w/vax only ne01512 1/8 us x 1/4 Hz 127 code 4 203842-204319 32 +8 RCP NO ECHOES PFS 1/8 us x 1/4 Hz 127 code 14 213634-214518 30/32 +8 RCP PO soln 32; PFS soln 30 PFS 1/8 us x 1/4 Hz 127 code 15 214707-220502 30 +8 RCP PO soln 30; PFS soln 30 Jan. 15 Goldstone CW spectrum: Transmit RCP Jan. 15 Goldstone CW spectrum: Transmit LCP Jan. 15 Goldstone images January 18 (DOY 018) PSD02018.4660_Nereus, VOLT02018.4660_Nereus CW 2 kHz 4096 FFT 10 165836-170845 32 none RCP same file,15 s dwell CW 2 kHz 4096 FFT 10 171301-172310 32 none RCP same file,10 s dwell CW 2 kHz 4096 FFT 10 172831-173841 32 none LCP same file,10 s dwell PFS 1/8 us 127 code 49 183025-192217 32 +8 RCP ne01803 1 us x 3.0 Hz 127 code 4 193006-193357 32 +30 RCP ne01806 1/8 us x 1/4 Hz 127 code 53 194956-204848 32 +8 RCP ne01807 1/8 us x 1/4 Hz 127 code 54 211746-221803 32 +8 RCP ne01808 1/8 us x 1/4 Hz 127 code 54 222329-232336 32 +8 RCP ne01809 1/8 us x 1/4 Hz 127 code 35 232444-000519 32 +8 RCP Jan. 18 Goldstone CW spectrum: Transmit RCP Jan. 18 Goldstone CW spectrum: Transmit LCP Jan. 18 Goldstone images January 19 (DOY 019) ne01903 1 us x 3.0 Hz 127 code 4 170248-170629 34 +30 RCP ne01906 1/8 us x 1/8 Hz 127 code 53 172257-182213 34 +8 RCP ne01907 1/8 us x 1/8 Hz 127 code 53 183239-193510 34 +8 RCP ne01908 1/8 us x 1/8 Hz 127 code 53 193937-203847 34 +8 RCP ne01909 1/8 us x 1/8 Hz 127 code 37 204933-213046 34 +8 RCP STRONG RFI ne01910 1/8 us x 1/8 Hz 127 code 23 213614-220126 34 +8 RCP ne01911 1/8 us x 1/8 Hz 127 code 44 221207-230019 34 +8 RCP PSD02019RCP.4660_Nereus, VOLT02019RCP.4660_Nereus CW 2 kHz 4096 FFT 10 230840-231932 34 none RCP PSD02019RCP.4660_Nereus, VOLT02019RCP.4660_Nereus CW 2 kHz 4096 FFT 10 232344-233330 34 none LCP Jan. 19 Goldstone CW spectrum: Transmit RCP Jan. 19 Goldstone CW spectrum: Transmit LCP Jan. 19 Goldstone images January 20 (DOY 020) PSD02020RCP.4660_Nereus, VOLT02020RCP.4660_Nereus CW 2 kHz 4096 FFT 10 170554-171544 36 none RCP PSD02020LCP.4660_Nereus, VOLT02020LCP.4660_Nereus CW 2 kHz 4096 FFT 10 171819-172809 36 none LCP ne02003 1 us x 3.0 Hz 127 code 5 174647-175136 36 +30 RCP ne02006 1/8 us x 1/8 Hz 127 code 52 185417-195234 36 +8 RCP ne02007 1/8 us x 1/8 Hz 127 code 50 200137-205722 36 +8 RCP ne02008 1/8 us x 1/8 Hz 127 code 50 211421-221014 36 +8 RCP ne02009 1/8 us x 1/8 Hz 127 code 42 221236-225949 36 +8 RCP Jan. 20 Goldstone CW spectrum: Transmit RCP Jan. 20 Goldstone CW spectrum: Transmit LCP Jan. 20 Goldstone images January 22 (DOY 022) PSD02022RCP.4660_Nereus, VOLT02022RCP.4660_Nereus CW 2 kHz 4096 FFT 10 165724-170655 36 none RCP PSD02022LCP.4660_Nereus, VOLT02022LCP.4660_Nereus CW 2 kHz 4096 FFT 10 170805-171736 36 none LCP PFS 1/8 us, 127 code 68 185639-200422 36 +8 RCP Jan. 22 Goldstone CW spectrum: Transmit RCP Jan. 22 Goldstone CW spectrum: Transmit LCP January 23 (DOY 023) PSD02023RCP.4660_Nereus, VOLT02023RCP.4660_Nereus CW 2 kHz 4096 FFT 10 150544-151515 36 none RCP PSD02023LCP.4660_Nereus, VOLT02023LCP.4660_Nereus CW 2 kHz 4096 FFT 10 151648-152618 36 none RCP ne02303 1 us x 3.0 Hz 127 code 5 153745-154225 36 +30 RCP ne02304 1/8 us x 1/8 Hz 127 code 50 154532-163719 36 +8 RCP ne02305 1/8 us x 1/8 Hz 127 code 50 164050-173327 36 +8 RCP ne02306a 1/8 us x 1/8 Hz 127 code 18 174108-175937 36 +8 RCP ne02309 1/8 us x 1/8 Hz 127 code 50 182901-192124 36 +8 RCP ne02310 1/8 us x 1/8 Hz 127 code 24 192534-195008 36 +8 RCP Jan. 23 Goldstone CW spectrum: Transmit RCP Jan. 23 Goldstone CW spectrum: Transmit LCP Jan. 23 Goldstone images January 24 (DOY 024) PSD02024.4660_Nereus, VOLT02024.4660_Nereus CW 2 kHz 4096 FFT 5 144542-145019 38 none RCP ne02403 1/8 us x 1/8 Hz 127 code 50 150626-160243 38 +8 RCP ne02404 1/8 us x 1/8 Hz 127 code 50 160625-170203 38 +8 RCP ne02405 1/8 us x 1/8 Hz 127 code 16 171212-172945 38 +8 RCP Jan. 24 Goldstone CW spectrum: Transmit RCP Jan. 24 Goldstone images January 25 (DOY 025) PSD02025.4660_Nereus, VOLT02025.4660_Nereus CW 2 kHz 4096 FFT 5 162119-162607 38 none RCP ne02503 1/8 us x 1/8 Hz 127 code 50 163712-173455 38 +8 RCP ne02504 1/8 us x 1/8 Hz 127 code 52 174320-184509 38 +8 RCP ne02505 1/8 us x 1/8 Hz 127 code 7 184754-185520 38 +8 RCP Jan. 25 Goldstone CW spectrum: Transmit RCP Jan. 25 Goldstone images January 26 (DOY 026) PSD02026.4660_Nereus, VOLT02026.4660_Nereus CW 2 kHz 4096 FFT 5 140539-141034 38 none RCP ne02603 1/8 us x 1/8 Hz 127 code 6 142109-142738 38 +8 RCP ne02603 1/8 us x 1/8 Hz 127 code 52 143514-153339 38 +8 RCP ne02604 1/8 us x 1/8 Hz 127 code 50 153744-163703 38 +8 RCP ne02605 1/8 us x 1/8 Hz 127 code 16 163929-165752 38 +8 RCP ne02606 1/8 us x 1/8 Hz 127 code 28 172508-175804 38 +8 RCP ne02607 1/8 us x 1/8 Hz 127 code 54 180945-191426 38 +8 RCP Jan. 26 Goldstone CW spectrum: Transmit RCP Jan. 26 Goldstone images January 27 (DOY 027) PSD02027.4660_Nereus, VOLT02027.4660_Nereus CW 2 kHz 4096 FFT 5 134544-135048 38 none RCP ne02704 1/8 us x 1/8 Hz 127 code 50 141301-151423 38 +8 RCP ne02705 1/8 us x 1/8 Hz 127 code 50 152536-162703 38 +8 RCP ne02706 1/8 us x 1/8 Hz 127 code 4 162929-163343 38 +8 RCP ne02707 1/8 us x 1/8 Hz 127 code 50 164433-174604 38 +8 RCP ne02708 1/8 us x 1/8 Hz 127 code 11 175445-180742 38 +8 RCP ne02709 1/8 us x 1/8 Hz 127 code 42 181750-190929 38 +8 RCP Jan. 27 Goldstone CW spectrum: Transmit RCP Jan. 27 Goldstone images January 29 (DOY 029) PSD02029RCP.4660_Nereus, VOLT02029RCP.4660_Nereus CW 2 kHz 4096 FFT 10 140638-141844 38 none RCP PSD02029LCP.4660_Nereus, VOLT02029LCP.4660_Nereus CW 2 kHz 4096 FFT 10 142039-143245 38 none RCP ne02903 1 us x 3.0 Hz 127 code 10 145946-151224 38 +30 RCP ne02906 1/8 us x 1/8 Hz 127 code 4 152151-152628 38 +8 RCP ne02907 1/8 us x 1/8 Hz 127 code 50 153000-163718 38 +8 Hz,+30 gates RCP ne02908 1/8 us x 1/8 Hz 127 code 46 163956-174622 38 +8 Hz,+30 gates RCP ne02909 1/8 us x 1/8 Hz 127 code 20 175830-182922 38 +8 Hz,+30 gates RCP Jan. 29 Goldstone CW spectrum: Transmit RCP Jan. 29 Goldstone CW spectrum: Transmit LCP Jan. 29 Goldstone images
Dr. Steven J. Ostro | PHONE: (818) 354-3173 300-233 | FAX: (818) 354-9476 Jet Propulsion Laboratory | email: ostro@echo.jpl.nasa.gov Pasadena, CA 91109-8099

Asteroid Radar Astronomy