Radio Link Budgets of Lunar OSCAR II

Telemetry/Image Downlink

Item	Reliable Link	Lucky Case	Unit
Frequency	437	437	MHz
Distance	400000	380000	km
Modulation Type	GMSK	GMSK	-
TX Power	3	3	dBW
TX Gain	-6	-1	dBi
Ant Polarization Loss	3	1	dB
Free Space Loss	197.3	196.8	dB
Other Path Loss	1	1	dB
RX Gain	30	22	dBi
RX Input Level	-144.3	-145.8	dBm
System Noise Figure	2	2	dB
Receiver C/N0	27.7	26.2	dBHz
Data Rate	125	125	bps
Required Eb/N0	1.0	1.0	dB
Implementation Loss	2	2	dB
C/N0 Threshold	24.0	24.0	dBHz
Margin	3.7	2.2	dB

Digipeater Downlink

Item	Reliable Link	Lucky Case	Unit
Frequency	437	437	MHz
Distance	400000	380000	km
Modulation Type	JT4G	JT4G	-
TX Power	3	3	dBW
TX Gain	-6	-1	dBi
Ant Polarization Loss	3	1	dB
Free Space Loss	197.3	196.8	dB
Other Path Loss	1	1	dB
RX Gain	22	15	dBi
RX Input Level	-152.3	-152.8	dBm
System Noise Figure	2	2	dB
Receiver C/N0	19.7	19.2	dBHz
C/N0 Threshold	17.0	17.0	dBHz
Margin	2.7	2.2	dB

Command Uplink

Item	Value	Unit
Frequency	437	MHz
Distance	400000	km
Modulation Type	GMSK	-
TX Power	23	dBW
TX Gain	22	dBi
Ant Polarization Loss	3	dB
Free Space Loss	197.3	dB
Other Path Loss	1	dB
RX Gain	-6	dBi
RX Input Level	-132.3	dBm
Sensitivity	-140	dBm
Margin	7.7	dB

Digipeater Uplink

Item	Value	Unit
Frequency	437	MHz
Distance	400000	km
Modulation Type	JT4G	-
TX Power	14	dBW
TX Gain	22	dBi
Ant Polarization Loss	3	dB
Free Space Loss	197.3	dB
Other Path Loss	1	dB
RX Gain	-6	dBi
RX Input Level	-141.3	dBm
System Noise Figure	10	dB
Receiver C/N0	22.7	dBHz
C/N0 Threshold	17.0	dBHz
Margin	5.7	dB