(Please note that I do not officially represent the Cassini project, JPL, or NASA. Any opinion expressed herein is mine)

On Monday, July 19th 1999 at 16:00 UTC, Cassini will execute Trajectory Control
Maneuver #10 (although it's really the seventh, because three have been deemed
unnecessary)

Here are some statistics on TCM-10: (see notes below)

Total DV                    = 5.133 m/s
Total Burn DV               = 5.121 m/s
Total Turn DV (from MPF)    = 1.766e-02 m/s
Total Turn DV (from TRNDOPP)= 2.354e-02 m/s
 
 Spacecraft Event Time     Earth-Receive Time        Event
 ------------------------  ------------------------  --------------
19-JUL-1999 15:36:58.4801 19-JUL-1999 15:39:25.2422  Start Roll wind  
19-JUL-1999 15:42:45.4758 19-JUL-1999 15:45:12.2379  Stop Roll wind   
19-JUL-1999 15:47:51.0758 19-JUL-1999 15:50:17.8379  Start Yaw wind   
19-JUL-1999 15:54:59.8000 19-JUL-1999 15:57:26.5621  Stop Yaw wind    
19-JUL-1999 15:55:30.0000 19-JUL-1999 15:57:56.7621  Start 7OFFSET    
19-JUL-1999 15:55:57.7225 19-JUL-1999 15:58:24.4846  Stop 7OFFSET     
19-JUL-1999 16:00:00.0000 19-JUL-1999 16:02:26.7621  Start Burn       
19-JUL-1999 16:00:54.6492 19-JUL-1999 16:03:21.4113  Nominal Burn End 
19-JUL-1999 16:01:00.1142 19-JUL-1999 16:03:26.8762  Max Burn End     
19-JUL-1999 16:01:11.6142 19-JUL-1999 16:03:38.3762  Start 7OFFSET    
19-JUL-1999 16:01:39.3366 19-JUL-1999 16:04:06.0987  Stop 7OFFSET     
19-JUL-1999 16:03:11.6142 19-JUL-1999 16:05:38.3762  Start Yaw unwind 
19-JUL-1999 16:10:20.3383 19-JUL-1999 16:12:47.1004  Stop Yaw unwind  
19-JUL-1999 16:15:26.5383 19-JUL-1999 16:17:53.3004  Start Roll unwind
19-JUL-1999 16:21:13.5341 19-JUL-1999 16:23:40.2962  Stop Roll unwind 
 
Down-leg Light Time               = 00:02:26.7621  (hours:minutes:seconds)
Up-leg Light Time                 = 00:02:26.7462
Doppler Shift due to Burn (2-way) = -0.478 Hz
Doppler Shift due to Burn (1-way) = -0.239 Hz
Doppler Shift due to Total (2-way)=  0.106 Hz
Earth-Line DV due to Burn         = -0.009 m/s
Antenna-Earth-look angle pre-turn = 46.463 degs
Antenna-Earth-look angle for burn = 136.804 degs
Burn DV, Earth Look angle         = 89.905 degs
Total DV, Earth Look angle        = 90.021 degs

DV stands for delta-v and refers to the change in velocity made by the maneuver

the up-leg and down-leg light time tells you how long it takes our radio
communications to reach the spacecraft and vice-versa.

Here's the deadband tightening event. We model it -- in the plot it looks like there's a disturbance that goes away. It doesn't.

This shows the rest of the events. Unfortunately, this maneuver required the antenna to be on the far side of the spacecraft, necessitating a communications black-out. However, as we returned the spacecraft to its pre-maneuver orientation, communication is re-established! Woo-hoo!

It may not look like this maneuver made much of a change, however, it did make a substantial change. It's just that the change it made was not along the line-of-sight to the spacecraft.

I realize this is pretty terse, but these pages are works-in-progress. Click the button below and you'll receive email as I make improvements.