Frequencies
From APRSWiki
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APRS Frequencies
Primary VHF Networks
- North America: 144.390 MHz (Voice Alert 100.0 Hz CTCSS, mobiles only please!)
- Europe: 144.800 MHz (Voice Alert 136.5 Hz CTCSS)
- Russia: 144.800 MHz
- Australia: 145.175 MHz (Voice Alert 91.5 Hz CTCSS)
- New Zealand: 144.575 MHz
- Argentina: 144.930 MHz
- Uruguay: 144.930 MHz (145.010 MHz also)
- Japan: 144.640 MHz (only KYUSHU region:144.660 MHz)
- South Africa: 144.800 Mhz
Alternative Input VHF Networks
For low-powered trackers only:
- Many areas: 144.99 MHz
- Western Washington State: 144.35 MHz
UHF Networks
- Europe / Africa (IARU region 1):
- Primary 433.800 MHz (heavy ISM interference in many countries)
- Secondary 432.500 MHz since 2008 where ISM is too bad on 433.800 (CT08_C5_Rec32)
- Australia (VK): 439.100 MHz 1200 baud (in selected areas)
- Netherlands (PA): 430.5125 MHz 1200 baud
- Puget Sound, WA: 440.875 MHz 1200/9600 baud
- Puget Sound, WA: 440.800 MHz 9600 baud
- Kansas / Missouri: 446.175 MHz 1200 baud (primary, with infrastructure)
- Kansas / Missouri: 441.175 MHz 1200 baud (secondary / special event, no infrastructure)
- US Nationwide Proposed: 445.925 (proposed by Bob WB4APR)
- New Zealand (ZL): 432.575 MHz 1200 baud allocated but little usage
HF Frequencies
Dial frequencies based on default tones used in popular packet devices.
30 meters, 300 baud packet, Worldwide
| USB Dial Frequency | Mark Frequency | LSB Dial Frequency | |
|---|---|---|---|
| KAM, MFJ, TinyTrak | 10.147.600 MHz | 10.149.200 MHz | 10.151.000 MHz |
| AEA | 10.147.100 MHz | 10.149.200 MHz | 10.151.500 MHz |
Satellites
| Satellite | Uplink Frequency | Downlink Frequency | Alias | Mode | Status | Shedule |
|---|---|---|---|---|---|---|
| ISS | 145.990 MHz | 145.800 MHz | ARISS | 1200 baud AFSK packet | Active | |
| PCSAT-2 | 145.825 MHz | 435.275 MHz | ARISS or WIDE2-2 | 1200 baud AFSK packet | Active | |
| PCSAT-1 (NO-44) | 145.825 MHz | 145.825 MHz | ARISS | 1200 baud AFSK packet | Daylight Ops Only | |
| AO-51 (Echo) | 145.860 MHz | 435.150 MHz | PACB-1 | 9600 baud FSK packet | Active (see schedule) | Link |
Satellites are subject to doppler shift and you should adjust your uplink/downlink accordingly. Doppler will make the frequency on a LEO shift as follows:
- 2 m ±3 KHz (FM capture effect negates the need to adjust on this band)
- 70 cm ±10 KHz
- 13 cm ±50 KHz
