Gene and Danny:

Here is the time line for Saturday's MEX BSR: day 121 (local time 09:35 AM to
approximately 02:30 PM 01 May) at DSS 63.

This will be very similar to the other experiments we have done recently
except that it is shorter (only 42 minutes).  Surface echoes start on the
high side of the carrier, and slowly drift higher.  The region being probed
is cratered terrain south of the equator from roughly (20S, 140E) to (34S,
135E).  The incidence angle on the surface increases from 40 to 53 degrees.
Echoes will be weak, getting stronger as we go along.  LCP will always be
stronger than RCP, but RCP will gain throughout the observations.

For playback, I recommend the following for the 25 kHz data (no segment
longer than 88 minutes):

       Pre-cal
       Track until start of 100 kHz data
       Surface observations until end of 100 kHz data
       Remaining track plus post-cal

For 100 kHz playback two 21 minute segments would be best; but I can carve
these up at Stanford if you give me a 42 minute file from each RSR.

I'm not sure yet where I'll be during this experiment.  I'll give you contact
information later.

Thanks,
Dick

2010/121 (UTC)
- - - - - - -

16:35  Begin Pre-cal at DSS 63
       FGAIN = 60 dB (all channels, except X-RCP)
               65 dB X-RCP
       FRO_X = 0; FRO_S = 0 (all SCHAN)
       Start 4-channel 25 kHz recordings after Step 5 (new NOP)
       Stop 25 kHz recording after Step 20 (new NOP)

18:35  Begin track

       X-Band ON, telemetry should be ON - ignore it

18:36  S-Band ON

18:50  Resume 25 kHz recording

       Advise DSS 63 of switch to planetary coordinates at 19:00
       Advise DSS 63 of start of MINICAL #1 at 19:04

18:51  X-Band telemetry OFF

18:57  Begin SLEW #1

19:00  DSS 63 switch to planetary coordinates

19:02  FRO_X = +49000 Hz (SCHAN 3)
       FRO_S = +10000 Hz (SCHAN 3)

       FRO_X = +35000 Hz (SCHAN 4)

19:04  Begin MINICAL #1

19:19  End of MINICAL #1 (end of step 5)

19:21  End SLEW #1

       Begin 100 kHz recording (SCHAN 4)

19:33  FRO_X = +53000 Hz (SCHAN 3)

19:48  FRO_X = +57000 Hz (SCHAN 3)

19:56  Advise station of MINICAL #2 starting at 20:06 and
       Advise station of return to S/C pointing predictions at 20:22

20:03  End 100 kHz recording (SCHAN 4)

       Begin SLEW #2

20:06  Begin MINICAL #2

20:20  End SLEW #2

20:21  End MINICAL #2 (end of step 5)

20:22  DSS 63 return to spacecraft pointing predicts

       FRO_X = 0 Hz (SCHAN 3)
       FRO_S = 0 Hz (SCHAN 3)

20:36  X-Band LOS
       S-Band LOS

20:37  Early end of track (scheduled EOT 21:45)

       Go to zenith

       Begin post-cal when ready

22:45  End post-cal (or earlier, if post-cal complete)

       End 25 kHz recordings

       End of Activity