Promoting science and education by exploring frontiers in amateur radio and high altitude balloons.
ANSR, Arizona Near Space Research, is a Phoenix, Arizona based non-profit 501(c)(3) organization that promotes science and  education by exploring frontiers in amateur radio and high altitude balloons.

Arizona Near Space Research


Last Updated 7 April 2011
Copyright 2011
by David G. Iadevaia,Ph.D.
Tucson, AZ

Below is the General Communications Plan that ANSR follows.

Talk-in frequency used prior to launch and tracking team coordination during flight (when the ANSR cross-band repeater is not available) is the Sacaton Peak repeater, 447.725/442.725 MHz 100.0 Hz CTCSS tone. Traffic on the cross-band input can inhibit the beacon activity from the payload computer, therefore it is recommended an alternate simplex frequency be used in the critical minutes prior to and during payload landing and recovery.

Our mobile cross band digi-peater will repeat the 445.950MHz APRS data to the 144.390 MHz national standard APRS frequency and subsequently I-Gated to the Internet for out-of-area trackers.

Payload frequency plan:

Cross Band NB-FM Voice Repeater
Details: http://www.ansr.org/kd7lmo/www.kd7lmo.net/pc.html
Input: 145.560 MHz/162.2 Hz CTCSS tone
Output: 445.525 MHz Linked to IRLP Node 9255
APRS when repeater not in use on 445.950 MHz at 10, 20, 40, and 50 seconds UTC time via KA7NSR-11
Landing prediction after burst at 15 and 45 seconds UTC time via KA7NSR (no -SSID) on APRS
Internet tracking via I-Gate
For general use: Track KA7NSR-11 on aprs.fi
More compact; For older browsers and mobile users: Track KA7NSR-11 on aprs.fi
Another general use tracking site: Track KA7NSR-11 on findu.com

APRS Beacon (KA7NSR-11):
445.950 MHz packet at 5, 25, 35, 55 seconds UTC time via KA7NSR-11
Internet tracking via I-Gate
For general use: Track KA7NSR-11 on aprs.fi
More compact; For older browsers and mobile users: Track KA7NSR-11 on aprs.fi
Another general use tracking site: Track KA7NSR-11 on findu.com

HF-Beacon
Details incl message format: http://www.ansr.org/kd7lmo/www.kd7lmo.net/hf-aprs.html
PSK-31 on 14070.450 KHz(20m) at 0, 6, 12, 18, 24, 30, 36, 42, 48,54 MINUTES and 00 seconds UTC time
No 80m PSK-31
APRS on 144.340MHz every minute at 54, 56, and 58 seconds UTC time via KA7NSR-11
APRS on 144.390MHz once a minute at 52 seconds UTC time via KA7NSR-11
Internet tracking via I-Gate
For general use: Track KA7NSR-11 on aprs.fi
More compact; For older browsers and mobile users: Track KA7NSR-11 on aprs.fi
Another general use tracking site: Track KA7NSR-11 on findu.com
General Flight Information