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mikaelnousiainen / RS41ng

Custom firmware for Vaisala RS41 and Graw DFM-17 radiosondes with support for amateur radio use. Ideal for tracking high-altitude balloons. Supported modes include APRS, Horus 4FSK mode, CATS, morse code (CW) and additional digital modes like WSPR and FT8 via Si5351.
GNU General Public License v2.0
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Add leap seconds to GPS time to fix scheduled transmit #34

Closed mikaelnousiainen closed 10 months ago

mikaelnousiainen commented 1 year ago

Scheduled transmissions use GPS time of week, which does not include leap seconds. The offset between GPS time and UTC is currently 18 seconds: https://timetoolsltd.com/gps/what-is-gps-time/

Add configurable leap seconds offset value to the firmware and use it in the scheduling code.

iz2fly commented 1 year ago

I'm testing WSPR digital mode in 144MHz with Si5351 and 10MHz OCXO. This is the best firmware I've found, congratulations. I didn't understand this shift from UTC time. Maybe it's better to put a note next to TIME_SYNC_OFFSET_SECONDS in the config.h file. Thank you

mikaelnousiainen commented 10 months ago

Fixed in https://github.com/mikaelnousiainen/RS41ng/commit/767c1a2f544efd622b01c1ef15064432f74d0f24