Telecom system performance was good this sol. The LMRE modem was turned off just before the end of the first downlink and therefore during the second downlink there was no data. The remainder of the Sol 33 data will come down on Sol 34. The remaining Sol 30 telecom data was not received on the Sol 33 downlink.
The end-of-sol communication system performance for the first downlink was as follows:
SOL 33 FIRST DOWNLINK TELECOM STATISTICS
Rov Radio Temp Low = -11.7
Rov Radio Temp High = 37.1
Rov Radio Temp Avg = 26.5
LMRE Radio Temp Low = 5.7
LMRE Radio Temp High = 24.0
LMRE Radio Temp Avg = 17.2
Rx Current Low = 43.5
Rx Current High = 49.3
Rx Current Avg = 47.6
Tx Current Low = 150.8
Tx Current High = 165.3
Tx Current Avg = 157.6
LMRE Good Frames = 2117
LMRE Garbled Frames = 1721
Avg LMRE Link Quality%= 55.2
TX_CH_FRAMES = 5356
RX_CH_FRAMES = 4652
Total Frame Resends = 704
Avg Rover Link Quality%= 86.9
COM:Bad CRC Errors = 8
COM:Timeout Errors = 19013
COM:Rx Abort Errors = 658
COM:No Sync Errors = 0
COM:RX Com Errors = 31627
In planning the sequence for Sol 35 and beyond (because there is no uplink on Sol 34), the revised modem heating strategy used on Sol 30 (and which has been in place since Sol 27) should be followed:
The rover modem should be commanded in the next-day runout sequence to perform a 600 second modem heating at wakeup. If no overnight APXS operations are to be conducted, the wakeup rover modem heating should be extended to 900 seconds. Modem reheating should be triggered by an excessive number of frame retries on the rover-to-lander link, and the reheating should continue for five minutes or until the rover modem reaches +30 C. However, if the LMRE radio is off, then the reheat to get to +30C is not needed. This requires some coordination of timing between the LMRE ON times and the rover transmissions. The sequence planners should consider the uncertainty in event completion times introduced by any required modem reheating cycles.
We are continuing our suspension of the previous recommendation to operate on LMRE-A for ten minutes prior to the expected rover wakeup time.
