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Use J2000 as input epoch when Stellarium is connected #376

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Use J2000 as input epoch when Stellarium is connected #376

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12 changes: 9 additions & 3 deletions python/PiFinder/pos_server.py
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@
sr_result = None
sequence = 0
ui_queue: Queue
is_stellarium = False

# shortcut for skyfield timescale
ts = sf_utils.ts
Expand Down Expand Up @@ -167,11 +168,13 @@ def parse_sd_command(shared_state, input_str: str):


def handle_goto_command(shared_state, ra_parsed, dec_parsed):
global sequence, ui_queue
global sequence, ui_queue, is_stellarium
ra = ra_to_deg(*ra_parsed)
dec = dec_to_deg(*dec_parsed)
logger.debug("handle_goto_command: ra,dec in deg, JNOW: %s, %s", ra, dec)
_p = position_of_radec(ra_hours=ra / 15, dec_degrees=dec, epoch=ts.now())
epoch = ts.J2000 if is_stellarium else ts.now()
epoch_s = "J2000" if is_stellarium else "JNOW"
logger.debug("handle_goto_command: ra,dec in deg, %s: %s, %s", epoch_s, ra, dec)
_p = position_of_radec(ra_hours=ra / 15, dec_degrees=dec, epoch=epoch)
ra_h, dec_d, _ = _p.radec(epoch=ts.J2000)
sequence += 1
comp_ra = float(ra_h._degrees)
Expand Down Expand Up @@ -233,8 +236,10 @@ def setup_server_socket():


def handle_client(client_socket, shared_state):
global is_stellarium
client_socket.settimeout(60)
client_socket.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
is_stellarium = False

while True:
try:
Expand All @@ -253,6 +258,7 @@ def handle_client(client_socket, shared_state):
# Special case for the ACK command in the LX200 protocol sent by Stellarium
# No leading : for the ACK command but Stellarium leads all commands with #
elif in_data[0] == 0x06 or (in_data[0] == b'#' and in_data[1] == 0x06):
is_stellarium = True
# A indicates alt-az mode
client_socket.send("A".encode())
except socket.timeout:
Expand Down