KD7LMO - ANSR


ANSR ANSR-25 Summary Photos Data

ANSR-25 Flight Summary

Launch 3 Sep 2005, 1524 UTC, (8:24 AM MST)

Payloads Payload Computer, Micro Beacon II, HF-APRS

Flight Notes

ARHAB (Amateur Radio High Altitude Ballooning Record) competition flight. The portion of the contest we are attempting includes:

1. VHF/UHF Greatest Telemetry Distance (APRS on 445.950 MHz)
2. HF Greatest Telemetry Distance (PSK-31 on 14070.450 KHz) - Record 1,719 miles with Steve, W8CSN.
3. Greatest 2-way QSO (Cross Band Voice Repeater)

Intermediate connection in antenna feed line coax caused very sporadic cross band repeater operation. Limited operational usage.

Balloon didn't burst cleanly resulting in very chaotic descent. Payload train appeared to tumble beyond 60° from vertical resulting in GPS lock loss.

Payload train separated during descent resulting in two separate landing sites. The HF-APRS and Micro Beacon II free fell back to the ground. Impact speed was nearly 70 MPH. Using packet data send during the free fall, we were able to locate the payloads. The HF-APRS internal power cable was disconnected and resulted in payload shutdown. The payload was later tested and operation was nominal. The Micro Beacon II continued to operate after impact, but only transmitted a carrier. It was determined the Alinco radio was damaged during impact. The internal controller and GPS were nominal. All hardware will be retired from service because of concerns of possible high G impact damage.

Flight Data

Data and statistics recovered from Flight Data Recorder:

24.1 statue miles from the launch site on a heading of 35° true

Fight time 2:36:02, landed 1800 UTC, (11:00 AM MST)

Departed at 1768', landed at 1117'

Peak altitude 97,783'

Average ascent rate 1014'/minute. Average descent rate 1575'/minute. At touch down 868'/minute.

Lowest external payload temperature -85.6° F, average -4.2° F.

Lowest internal payload temperature 14.3° F, average 48.1° F.

GPS maintained 99.947% 3D lock (5 seconds unlocked) during flight. Average PDOP 1.43. Average of 10.1 tracked satellites.

Average bus voltage 11.15 volts.

Flight Data Recorder and Maps

	Flight Data Recorder contents as comma separated text (ASCII). NOTE: This file contains the complete flight recording in one second increment. Additional information on telemetry measurands included with Payload Computer - Data Logger
	APRS data as received at IRLP node location.
	APRS data as received via I-gate and APRS Internet feed. Thanks again to Don, W7DAS, for his direct I-Gate connection of the data.
	Topographical Map.
	Landing site separation.

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