AVAPS dropsonde 下投式探空儀

FLIR UltraFORCE

transmitter EN302 054

400.16 -405.99 MHz meteorological band

in 20 kHz steps, creating about 300 separate channels.

Frequency stability: < +/- 10 kHz

RF power output: <200 mW

Channel spacing: 200 kHz

modulation: FSK

baud rate: 4800?

AIRHUB receiver

cf SEMTECH sx1278 spec p48

Reverse engineer:

Reference:

Vaisala RD94

Vaisala NRD41 , pdf

rs1729 radiosonde github, including dropsonde

Fingers-welt forum in German

APRS FI in HK

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