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CubeSatSim
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Update transmit.py add doppler mode to a,s,m modes

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master-bta
Alan Johnston 1 month ago committed by GitHub
parent 460801dbe9
commit 59de158f0c
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GPG Key ID: B5690EEEBB952194
1 changed files with 64 additions and 64 deletions
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128
transmit.py
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@ -247,10 +247,11 @@ def program_fm(rx, tx, rxpl_value, sq, txpl_value):
print("Restarting gpsd.socket")
system("sudo systemctl restart gpsd.socket")
def start_repeater(txr):
def start_repeater(tx_doppler_freq_hz):
global txLed
print("Starting repeater")
output(txLed, 1)
txr = "{:.3f}".format(tx_doppler_freq_hz/1000)
system("sudo nc -l 8011 | csdr convert_i16_f | csdr gain_ff 4000 | csdr convert_f_samplerf 20833 | sudo rpitx -i- -m RF -f " + txr + " > /dev/null 2>&1 &")
sleep(0.5)
system("sudo arecord -D shared_mic -r48000 -fS16_LE -c1 | nc localhost 8011 &")
@ -506,6 +507,27 @@ iss_doppler_passes = {
]
}
def update_doppler():
global start_time
global tx_doppler_freq_hz
global rx_doppler_freq_hz
global rxpl_value
global txpl_value
global sq
relative_time = (time.perf_counter() - start_time) % 370
index = int(relative_time/10)
print(f"relative time: {relative_time:.1f} seconds after AOS is index: {index}")
table_row = doppler_table[index]
rx_doppler_shift_hz = table_row["doppler_434_khz"] * 1000
tx_doppler_shift_hz = table_row["doppler_144_khz"] * 1000
tx_doppler_freq_hz = tx_doppler_start_hz + tx_doppler_shift_hz
print(f"Tx Doppler shift: {tx_doppler_freq_hz:.0f}")
rx_doppler_freq_hz = rx_doppler_start_hz + rx_doppler_shift_hz
print(f"Rx Doppler shift: {rx_doppler_freq_hz:.0f}")
rx = "{:.4f}".format(rx_doppler_freq_hz/1e6)
program_fm(rx,tx,rxpl_value,sq,txpl_value)
print("CubeSatSim v2.2 transmit.py starting...")
pd = 21
@ -652,6 +674,7 @@ if __name__ == "__main__":
sim_mode = False
sim_config = False
hab_mode = False
doppler_mode == True
try:
file = open("/home/pi/CubeSatSim/sim.cfg")
@ -780,6 +803,19 @@ if __name__ == "__main__":
# if (mode != 'e'):
program_fm(rx,tx,rxpl_value,sq,txpl_value)
if (doppler_mode == True):
tx_doppler_start_hz = txrf * 1e6
tx_doppler_shift_hz = 0
print(f"Tx center frequency: {tx_doppler_start_hz}")
rx_doppler_start_hz = rxf * 1e6
rx_doppler_shift_hz = 0
print(f"Rx center frequency: {rx_doppler_start_hz}")
TARGET_PASS = 85 # Maximum elevation profile
doppler_table = iss_doppler_passes[TARGET_PASS]
print(f"Pass Max Elevation: {TARGET_PASS}°")
sim_failure_check()
if (hab_mode == True) and (mode == 'a'):
@ -884,11 +920,10 @@ if __name__ == "__main__":
system("cat /home/pi/CubeSatSim/t.txt")
if (command_tx == True):
output(txLed, 1)
# output(pd, 1)
# output (ptt, 0)
# sleep(.1)
#
# battery_saver_check()
if (doppler_mode == True):
update_doppler()
txf = tx_doppler_freq_hz / 1000
tx = "{:.4f}".format(txf)
if (txc):
sim_failure_check()
# output(pd, 1)
@ -940,7 +975,10 @@ if __name__ == "__main__":
## chan = chan + 1
if (command_tx == True):
output(txLed, 1)
if (doppler_mode == True):
update_doppler()
txf = tx_doppler_freq_hz / 1000
tx = "{:.4f}".format(txf)
if (txc):
sim_failure_check()
# output (pd, 1)
@ -1028,10 +1066,13 @@ if __name__ == "__main__":
system("/home/pi/PiSSTVpp/pisstvpp -r 48000 -p s2 /home/pi/CubeSatSim/camera_out.jpg")
system("sudo rm /home/pi/CubeSatSim/camera_out.jpg > /dev/null 2>&1")
# command_control_check()
if (command_tx == True):
print ("Sending SSTV image")
if (doppler_mode == True):
update_doppler()
txf = tx_doppler_freq_hz / 1000
tx = "{:.4f}".format(txf)
output(txLed, 1)
# battery_saver_check()
@ -1099,11 +1140,13 @@ if __name__ == "__main__":
system("/home/pi/PiSSTVpp/pisstvpp -r 48000 -p s2 /home/pi/CubeSatSim/sstv_image_2_320_x_256.jpg")
while 1:
# command_control_check()
if (command_tx == True):
print ("Sending SSTV image")
if (doppler_mode == True):
update_doppler()
txf = tx_doppler_freq_hz / 1000
tx = "{:.4f}".format(txf)
output(txLed, 1)
# battery_saver_check()
@ -1131,11 +1174,11 @@ if __name__ == "__main__":
system("(while true; do (sleep 10 && cat /home/pi/CubeSatSim/wav/sstv.wav); done) | csdr convert_i16_f | csdr gain_ff 7000 | csdr convert_f_samplerf 20833 | sudo rpitx -i- -m RF -f " + tx + "e3 &")
while 1:
if (command_tx == True):
# command_control_check()
if (doppler_mode == True):
update_doppler()
txf = tx_doppler_freq_hz / 1000
tx = "{:.4f}".format(txf)
output(txLed, 1)
# battery_saver_check()
if (txc):
sim_failure_check()
@ -1223,58 +1266,15 @@ if __name__ == "__main__":
print("Ready to detect carrier")
start_time = time.perf_counter()
tx_doppler_start_hz = txrf * 1e6
tx_doppler_shift_hz = 0
print(f"Tx center frequency: {tx_doppler_start_hz}")
rx_doppler_start_hz = rxf * 1e6
rx_doppler_shift_hz = 0
print(f"Rx center frequency: {rx_doppler_start_hz}")
TARGET_PASS = 85 # Maximum elevation profile
# PASS_START_TIME = -180 # The absolute time index where the pass begins
# TIME_FROM_START = 30 # 30 seconds into the pass
# Map the "time from start" to the "relative time index" used in the table
# relative_time_index = PASS_START_TIME + TIME_FROM_START
index = int(10/10)
try:
doppler_table = iss_doppler_passes[TARGET_PASS]
third_row = iss_doppler_passes[TARGET_PASS][index]
time_index = third_row["time_sec"]
doppler_shift = third_row["doppler_434_khz"]
uhf_freq = third_row["obs_434_mhz"]
print(f"Pass Elevation: {TARGET_PASS}°")
print(f"Time Index: {index}")
print(f"Extracted Doppler Shift (435.0 MHz): {doppler_shift:.2f} kHz")
print(f"UHF frequency (435.0 MHz): {uhf_freq:.4f} MHz")
except KeyError:
print("Error: The requested pass elevation or time index does not exist in the database.")
while True:
if (input(squelch) == False) and (command_tx == True):
relative_time = (time.perf_counter() - start_time) % 370
index = int(relative_time/10)
print(f"relative time: {relative_time:.1f} seconds after AOS is index: {index}")
table_row = doppler_table[index]
rx_doppler_shift_hz = table_row["doppler_434_khz"] * 1000
tx_doppler_shift_hz = table_row["doppler_144_khz"] * 1000
# tx_doppler_shift_hz = ((time.perf_counter() - start_time) * 100) % 20000
tx_doppler_freq_hz = tx_doppler_start_hz + tx_doppler_shift_hz
print(f"Tx Doppler shift: {tx_doppler_freq_hz:.0f}")
txr = "{:.3f}".format(tx_doppler_freq_hz/1000)
# print(txr)
rx_doppler_freq_hz = rx_doppler_start_hz + rx_doppler_shift_hz
print(f"Rx Doppler shift: {rx_doppler_freq_hz:.0f}")
rx = "{:.4f}".format(rx_doppler_freq_hz/1e6)
# print(rx)
program_fm(rx,tx,rxpl_value,sq,txpl_value)
print("Carrier detected")
start_repeater(txr)
if (doppler_mode == True):
update_doppler()
start_repeater(tx_doppler_freq_hz)
else:
start_repeater(txr)
while (input(squelch) == False):
sleep(1)
print("No carrier detected")

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