Project Horus High altitude balloon project

Horus 25

Technical information:

Launch date 20/5/12, 01:34 UTC
Landing date 20/5/12, 05:35 UTC
Flight duration approx 4 hours
Launch site -35.127, 138.8475
Landing site -35.1519, 139.6497
Flight path Web, KMZ
Distance traveled
73.2 km
Average speed 18.3 km/h
Maximum speed 109 km/h
Maximum altitude 31,360 m
Average ascent rate 3.3 m/s
Impact speed 2 m/s
Flight computer MicroNut Flight Computer
Additional payloads Osiris Cutdown Payload
Primary radio TX
Radiometrix NTX2 25mW (RTTY)
Telemetry 300 baud RTTY, CRC16 checksum
Tracking Ground stations (distributed listener), 2 chase cars, web based tracker


Horus 25 was another flight test of Mark's uplink cutdown payload. A day of lovely conditions and great weather saw two cars head out - Terry, Mark & Alan in one car, followed by Grant in his car. Grant (as usual) did an excellent job of capturing the day's activities on film:

As per Horus 24, the uplink and flight termination work perfectly, giving us another excellent opportunity to observe the balloon's landing.