This page is updated as needed , in order to inform the amateur radio community how to receive and decode signals generated by our projects and experiments. This is particularly useful for upcoming stratospheric balloon launches or other APRS tests. For any inquiry on this topic, please send an email to ham at roinspace dot com.
When and where
Next launch is planned for June 7th 2025, near Stalpu, Buzau, 10:00 local time.
Radio payloads
- Reprogrammed RS41 radiosonde (UHF)
- Consists of a recovered Vaisala RS41 radiosonde, using software developed by OM3BC.
- APRS 432.500MHz, callsign YO4ESC-14, rate 3/min.
- RTTY 435.500MHz (baudrate 50 bps, shift 540MHz, 7 data bits, parity none, 2 stop bits). FLDigi is configured by selecting: Op Mode → RTTY → Custom. The RTTY repeat rate is 3/min.
- CW 435.500MHz (identification only), rate 3/min.
- VHF APRS tracker
- Consists of an picoAPRS Lite (1W), with dipole antenna.
- APRS 144.8MHz, callsign YO4ESC-12, rate 3/min.
- Live telemetry on 915MHz, using a commercial Holybro 100mW link.
Predicted flight path (via https://predict.sondehub.org/):
