Goldstone and Arecibo Radar Observations Planning: Galileans during 2015 opposition of Jupiter
This is a planning page for radar observations of the Galilean satelites. Our objective is to use radar ranging measurements of the Galilean satellites in order to detect orbital changes due to their tidal interaction with Jupiter. The round-trip-time (RTT) to Jupiter is ~74 min at the time of our observations (around jovian opposition). Most of the Goldstone monostatic tracks and Goldstone-GBT bistatic tracks are at least 5 hours long, so we will be able to detect more than one satellite. The Arecibo tracks are limited by the declination window, so we will only detect one satellite each track. We have eleven tracks scheduled at Goldstone, of which eight are bistatic with GBT. We have eleven tracks scheduled at Arecibo. Jupiter is a strong radio source, so we have scheduled times when the satellites will be at their maximum angular separation from the planet, a geometry that minimizes Jovian noise. The previous observations by Ostro et al. (1992) demonstrate that this approach works and that the noise from the planet will not be a problem.
Physical properties of the Galilean satellites and their respective X- and S- Doppler bandwidths.
The SNRs are calculated based on the physical characteristics of the Galilean satellites. Assumed Goldstone Ptx=440 kW and Tsys=18K.
Assumed Arecibo Ptx=900 kW and Tsys=23 K. Bistatic tracks with DSS-14 transmitting and Green Bank Telescope (GBT) receiving will increase the SNRs by 3-fold with
respect to monostatic DSS-14 runs. These SNRs are valid plus/minus 3 weeks from the of opposition of Jupiter on Feb 6, 2015.
Diameter Rotation Period Radar Albedo X-band BW S-band BW SNRs (DSS-14) SNRs (GBT) SNRs (Arecibo)
[km] [h] [Hz] [Hz] (per run) (per run) (per run)
Io 3643.0 42.46 0.20 (OC) 8580 2380 6-7 18-21 180
Europa 3121.0 85.25 1.50 (SC) 3660 1020 50-56 150-160 1500
Ganymede 5268.0 171.71 0.84 (SC) 3070 852 84-97 250-290 2700
Callisto 4820.0 400.54 0.36 (SC) 1200 334 48-55 140-160 1400
Last update: 2015 Mar 5
WK DOY BOA BOT EOT EOA
03 018 0615 0745 1030 1100 DSS-14 GSSR GALIL
04 019 0315 0445 1030 1100 DSS-14 GSSR GALIL
04 021 0330 0500 1000 1030 DSS-14 GSSR GALIL
06 035 0315 0445 0920 0950 DSS-14 GSSR GALIL
06 036 0130 0300 0915 0945 DSS-14 GSSR GALIL
07 044 0310 0440 0845 0915 DSS-14 GSSR GALIL
08 050 0030 0200 0700 0730 DSS-14 GSSR GALIL
08 052 0130 0300 0800 0830 DSS-14 GSSR GALIL
09 060 0005 0135 0830 0900 DSS-14 GSSR GALIL
10 064 0400 0530 1020 1050 DSS-14 GSSR GALIL
10 067 0430 0600 1240 1310 DSS-14 GSSR GALIL
Goldstone tracks (note, if more than one satellite is on the schedule, they are ordered which goes first and second):
UT UT PST Duration Round-trip GBT
DOY Date Object TX Window TX Window hh:mm time (min) Receive Windows (UT)
018 Jan 18 Call 0745-1030 1145-0230 Jan 17/18 02:45 73.3 ------ only time for one moon
019 Jan 19 Call/Io 0445-1030 2045-0230 Jan 18/19 05:45 73.2 ------
021 Jan 21 Gany/Eu 0500-1000 2100-0200 Jan 20/21 05:00 72.9 0600-1115 bistatic with GBT
035 Feb 4 Gany/Io 0445-0920 2045-0120 Feb 3/4 04:35 72.4 0545-1030 bistatic with GBT Europa occulting Io 0851-0859 UT
036 Feb 5 Io/Call 0300-0915 1900-0115 Feb 4/5 06:15 72.3 0400-1030 bistatic with GBT
044 Feb 13 Io/Call 0440-0845 2040-0045 Feb 12/13 04:05 72.4 0545-1000 bistatic with GBT
050 Feb 19 Eu/Gany 0200-0700 1600-2300 Feb 18 05:00 72.8 0330-0815 bistatic with GBT
052 Feb 21 Io/Call 0300-0800 1900-0000 Feb 20 05:00 73.0 0315-0915 bistatic with GBT GBT part cancelled due to equipment issues
060 Mar 1 Io/Gany 0135-0830 1735-0030 Feb 28/Mar 1 06:55 73.7 0330-0945 bistatic with GBT Europa occulting Io 0409-0416 UT, track cancelled due to DSS-14 klystron problems
064 Mar 5 Gany/Call 0530-1020 2130-0220 Mar 4/5 04:50 74.2 0630-1007* bistatic with GBT track cancelled due to DSS-14 klystron problems
067 Mar 8 Gany/Call 0600-1240 2200-0440 Mar 7/8 06:40 74.6 ------ Ganymede occulting Callisto 0926-0950 UT
*Jupiter sets shortly before last possible reception from DSS-14
NOTE: GBT receive times start ~70 min from the start of DSS-14 transmit time and finish ~70 min past end of DSS-14 transmit time.
Arecibo tracks, all monostatic:
DOY UT UT PST AST Duration Round-trip
Date Object TX Window TX Window TX Window hh:mm time (min)
031 Jan 31 Ganymede 0351-0634 1951-2234 Jan 30 2351-0234 Jan 30/31 02:43 72.4
032 Feb 1 Ganymede 0346-0630 1946-2230 Jan 31 2346-0230 Jan 31/Feb 1 02:44 72.3
038 Feb 7 Callisto 0320-0603 1920-2203 Feb 6 2320-0203 Feb 6/7 02:43 72.3
039 Feb 8 Europa 0314-0558 1914-2158 Feb 7 2314-0158 Feb 7/8 02:44 72.3
041 Feb 10 Europa 0306-0550 1906-2150 Feb 9 2306-0150 Feb 9/10 02:44 72.3 cancelled due to receiver problems
042 Feb 11 Ganymede 0301-0545 1901-2145 Feb 10 2301-0145 Feb 10/11 02:44 72.3 cancelled due to receiver problems
043 Feb 12 Io 0257-0541 1857-2141 Feb 11 2257-0141 Feb 11/12 02:44 72.4
044 Feb 13 Io 0252-0536 1852-2136 Feb 12 2252-0136 Feb 12/13 02:44 72.4 finished just before GBT starts receiving an echo of Io
045 Feb 14 Io 0248-0532 1848-2132 Feb 13 2248-0132 Feb 13/14 02:44 72.4
046 Feb 15 Europa 0243-0527 1843-2127 Feb 14 2243-0127 Feb 14/15 02:44 72.5 DAQ failed, no data recorded
047 Feb 16 Callisto 0238-0522 1838-2122 Feb 15 2238-0122 Feb 15/16 02:44 72.5 no echo with 4 us setup
Additionally scheduled tracks:
055 Feb 24 Europa 0203-0448 1803-2048 Feb 23 2203-0048 Feb 23/24 02:45 cancelled due to transmitter problems
063 Mar 4 Ganymede 0128-0412 1728-2012 Mar 3 2128-0012 Mar 3/4 02:44 cancelled due to transmitter problems
Setups
NOTE: PRDX files have been generated for the sub-Earth points of Io, Europa, Ganymede, and Callisto.
The sub-radar point remains with 0.3 degrees of the body equator for all of them and, aside from Europa,
their triaxial radii vary by ~100 meters (very spherical). The IAU equatorial radius was
used as a constant to determine the leading bounce-point.
How to read PRDX file names (notes from J. Giorgini):
For example 14v-14-14:
* The first number (14) in the file name is the transmitter site code (DSS-14): who the
transmitter section of the predicts is designed to be read by (the PO).
It can have a 'v' or an 'f' after it:
'f' means fixed transmit (reference) frequency
'v' means variable transmit frequency ("Doppler"). If 'v', it means
the transmit predicts are linked to the second number, which is
the site code to whom transmitter is uplinking Doppler (the
"primary receiver")
* The second number is the "primary receiver" introduced above. If a 'v'
case (Doppler uplink by the transmitter), this second number is the site
for whom the transmission is designed so as to receive at the fixed
reference frequency. If instead an 'f' case, this primary receiver number
is optional since it has no affect on the transmission.
* The third number is the "secondary receiver", a receiver listening to the
signal defined by the first number pair. It is who the RCVR section of the
predicts file is for. The secondary receiver CAN be the same as primary
receiver. Or it can be different, if "listening in" on action between
two other sites.
DSS-14 monostatic tracks
Io
Io.PRDX.OUT.14v-14-14.2015Jan14-Mar16.JUP310
Io.PUNCH.OUT.14v-14-14.2015Jan14-Mar16.JUP310
Europa
Europa.PRDX.OUT.14v-14-14.2015Jan14-Mar16.JUP310
Europa.PUNCH.OUT.14v-14-14.2015Jan14-Mar16.JUP310
Ganymede
Ganymede.PRDX.OUT.14v-14-14.2015Jan14-Mar16.JUP310
Ganymede.PUNCH.OUT.14v-14-14.2015Jan14-Mar16.JUP310
Callisto
Callisto.PRDX.OUT.14v-14-14.2015Jan14-Mar16.JUP310
Callisto.PUNCH.OUT.14v-14-14.2015Jan14-Mar16.JUP310
DSS-14 to GBT (station 9) bistatic tracks
Io
Io.PRDX.OUT.14v-09-09.2015Jan14-Mar16.JUP310
Io.PUNCH.OUT.14v-09-09.2015Jan14-Mar16.JUP310
Europa
Europa.PRDX.OUT.14v-09-09.2015Jan14-Mar16.JUP310
Europa.PUNCH.OUT.14v-09-09.2015Jan14-Mar16.JUP310
Ganymede
Ganymede.PRDX.OUT.14v-09-09.2015Jan14-Mar16.JUP310
Ganymede.PUNCH.OUT.14v-09-09.2015Jan14-Mar16.JUP310
Callisto
Callisto.PRDX.OUT.14v-09-09.2015Jan14-Mar16.JUP310
Callisto.PUNCH.OUT.14v-09-09.2015Jan14-Mar16.JUP310
NOTE: All PRDX and PUNCH files are on aardvark: /export/data3/osod/ops/SATELLITES
Instructions
NOTE: Data should be moved to the appropriate subdirectories on aardvark:
/export/data0/Galileans/Io/logs/
/export/data0/Galileans/Europa/logs/
/export/data0/Galileans/Ganymede/logs/
/export/data0/Galileans/Callisto/logs/
POINTING FOR DSS-14:
Jan 18
Callisto
TRANSMITTER U.T. DOY hhmmss RA DEC RTT (sec)
2015 JAN 18 018 070000 142.927 15.6034 4401.8
2015 JAN 18 018 080000 142.924 15.6045 4401.4
2015 JAN 18 018 090000 142.921 15.6056 4401.0
2015 JAN 18 018 100000 142.917 15.6066 4400.6 note: last TX
RECEIVER U.T. DOY hhmmss RA DEC RTT (sec)
2015 JAN 18 018 080000 142.928 15.6031 4401.9 note: first possible receive
2015 JAN 18 018 090000 142.925 15.6042 4401.5
2015 JAN 18 018 100000 142.921 15.6053 4401.1
2015 JAN 18 018 110000 142.918 15.6064 4400.7
Jan 19
Callisto
TRANSMITTER U.T. DOY hhmmss RA DEC RTT (sec)
2015 JAN 19 019 040000 142.855 15.6286 4393.3
2015 JAN 19 019 050000 142.851 15.6300 4392.9
2015 JAN 19 019 060000 142.847 15.6313 4392.4
2015 JAN 19 019 070000 142.843 15.6327 4392.0
2015 JAN 19 019 080000 142.839 15.6341 4391.6
2015 JAN 19 019 090000 142.835 15.6356 4391.2
2015 JAN 19 019 100000 142.831 15.6370 4390.8 note: last TX
RECEIVER U.T. DOY hhmmss RA DEC RTT (sec)
2015 JAN 19 019 060000 142.852 15.6297 4393.0 note: first possible receive
2015 JAN 19 019 070000 142.848 15.6310 4392.5
2015 JAN 19 019 080000 142.844 15.6324 4392.1
2015 JAN 19 019 090000 142.840 15.6338 4391.7
2015 JAN 19 019 100000 142.836 15.6352 4391.3
2015 JAN 19 019 110000 142.832 15.6367 4390.9
Io
TRANSMITTER U.T. DOY hhmmss RA DEC RTT (sec)
2015 JAN 19 019 040000 142.677 15.6930 4387.1
2015 JAN 19 019 050000 142.669 15.6956 4387.2
2015 JAN 19 019 060000 142.662 15.6980 4387.3
2015 JAN 19 019 070000 142.656 15.7001 4387.5
2015 JAN 19 019 080000 142.651 15.7019 4387.7
2015 JAN 19 019 090000 142.646 15.7035 4387.9
2015 JAN 19 019 100000 142.642 15.7047 4388.0 note: last TX
RECEIVE U.T. DOY hhmmss RA DEC RTT (sec)
2015 JAN 19 019 060000 142.671 15.6951 4387.1 note: first possible receive
2015 JAN 19 019 070000 142.664 15.6975 4387.3
2015 JAN 19 019 080000 142.657 15.6997 4387.5
2015 JAN 19 019 090000 142.652 15.7016 4387.6
2015 JAN 19 019 100000 142.647 15.7032 4387.8
2015 JAN 19 019 110000 142.643 15.7045 4388.0
Jan 21 bistatic
Ganymede
TRANSMITTER U.T. DOY hhmmss RA DEC RTT (sec)
2015 JAN 21 021 050000 142.381 15.7961 4379.6
2015 JAN 21 021 060000 142.377 15.7975 4379.6
2015 JAN 21 021 070000 142.373 15.7989 4379.7
2015 JAN 21 021 080000 142.369 15.8002 4379.7
2015 JAN 21 021 090000 142.366 15.8014 4379.7
2015 JAN 21 021 100000 142.362 15.8026 4379.8
Europa
TRANSMITTER U.T. DOY hhmmss RA DEC RTT (sec)
2015 JAN 21 021 050000 142.429 15.7791 4374.7
2015 JAN 21 021 060000 142.422 15.7818 4374.7
2015 JAN 21 021 070000 142.414 15.7845 4374.8
2015 JAN 21 021 080000 142.407 15.7870 4374.8
2015 JAN 21 021 090000 142.400 15.7895 4374.9
2015 JAN 21 021 100000 142.393 15.7919 4375.0
Feb 4 bistatic
Ganymede
Date (UTC) DOY hhmmss RA DEC RTT (sec)
2015 FEB 04 035 040000 140.625 16.3850 4338.0
2015 FEB 04 035 050000 140.619 16.3868 4338.2
2015 FEB 04 035 060000 140.613 16.3886 4338.4
2015 FEB 04 035 070000 140.608 16.3903 4338.7
2015 FEB 04 035 080000 140.603 16.3920 4338.9
2015 FEB 04 035 090000 140.598 16.3936 4339.1
Io
Date (UTC) DOY hhmmss RA DEC RANGE (s)
2015 FEB 04 035 040000 140.682 16.3649 4337.4
2015 FEB 04 035 050000 140.675 16.3672 4337.8
2015 FEB 04 035 060000 140.669 16.3691 4338.1
2015 FEB 04 035 070000 140.664 16.3707 4338.5
2015 FEB 04 035 080000 140.660 16.3721 4338.9
2015 FEB 04 035 090000 140.656 16.3732 4339.3
2015 FEB 04 035 100000 140.653 16.3740 4339.6
Feb 5 bistatic
Io
Date (UTC) DOY hhmmss RA DEC RANGE (s)
2015 FEB 05 036 040000 140.622 16.3828 4337.4
2015 FEB 05 036 050000 140.616 16.3849 4337.0
2015 FEB 05 036 060000 140.608 16.3874 4336.6
2015 FEB 05 036 070000 140.600 16.3900 4336.2
2015 FEB 05 036 080000 140.591 16.3929 4335.8
2015 FEB 05 036 090000 140.582 16.3960 4335.5
2015 FEB 05 036 100000 140.572 16.3993 4335.3
Callisto
Date (UTC) DOY hhmmss RA DEC RANGE (s)
2015 FEB 05 036 040000 140.745 16.3401 4340.5
2015 FEB 05 036 050000 140.740 16.3417 4340.3
2015 FEB 05 036 060000 140.735 16.3434 4340.1
2015 FEB 05 036 070000 140.730 16.3450 4339.9
2015 FEB 05 036 080000 140.725 16.3467 4339.6
2015 FEB 05 036 090000 140.720 16.3483 4339.4
2015 FEB 05 036 100000 140.715 16.3500 4339.2
PRDX.OUT.14f-14-14.??
TRANSMITTER: STATION #14, RECEIVER: STATION #14
RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL