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2021-01-31 16:07:35

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## Chinese Lunar Orbiter Chang'e-2

Page: Sats.Change2 - Last Modified : Sun, 19 Jun 11

S-band downlink parameters
Frequency: | 2210.8 MHz
Modulation: | PM
Downlink modulation: | +/-65536Hz sidebands
| 1024Bd BPSK
Coding: | Viterbi 1/2
Frame: | 1024bits (after Viterbi)
Syncword: | 44 44 24 C4 50 hex
Uplink echo on downlink: | +/-8040Hz sidebands
| 125Bd BPSK
More info will be added soon...
S-band downlink spectrum screenshots (using 10m dish):
Basic TLM, SC not being commanded
SC sweeps and locks to groundstation
Start of commanding, uplink echo subcarrier appears
Middle of pass, SC locked to GS, showing all subcarriers
End of visibility from GS, SC unlocks
SC doppler and signal level with compensated Moon doppler

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