I like playing around occcasionally with HF Data Link (the HF version of ACARS). I think these HFDL squitters are also excellent propagation beacons. And I have seen an occasional military aircraft. If you want to get into the world of HFDL monitoring you can download a free or commericial ($35 fee) version of my friend Charles Brain's PC-HFDL program off his website at PC-HFDL .
And since you are here reading this, I will let you in on a secret. MT Computer and Radio columnist John Catalano will cover this PC-HFDL Professional program in his September 2006 column in Monitoring Times. Shhhhh! Don't tell anybody I told you.
Here is the latest HFDL info: Table 6 Version 01D (12 May 2006)
HFDL SYSTEM TABLE from Andy (m0adl) and courtesy of the UDXF newsgroup list.
Ground Station ID 1 SAN FRANCISCO - CALIFORNIA
Longitude 121-45-34W Latitude 38-22-48N
2947.0 4672.0 5508.0 6559.0 8972.0 10081.0 11327.0 13276.0 17919.0 21934.0
Ground Station ID 2 MOLOKAI - HAWAII
Longitude 157-10-46W Latitude 21-10-47N
2947.0 3019.0 3434.0 4687.0 5463.0 5514.0 6559.0 6565.0 8912.0 8936.0 10081.0 11312.0 11348.0 13276.0 13312.0 13324.0 17919.0 17934.0 21928.0 21937.0
Ground Station ID 3 REYKJAVICK - ICELAND
Longitude 21-50-59W Latitude 64-04-47N
3116.0 3900.0 5720.0 6712.0 8977.0 11184.0 15025.0 17985.0
Ground Station ID 4 RIVERHEAD - NEW YORK
Longitude 72-38-22W Latitude 40-52-47N
3410.0 3428.0 5523.0 5652.0 6646.0 6652.0 6661.0 8831.0 8885.0 8912.0 10227.0 11315.0 11354.0 11387.0 13276.0 17919.0 17934.0 17952.0 21931.0 21934.0
Ground Station ID 5 AUCKLAND - NEW ZEALAND
Longitude 174-48-35E Latitude 37-01-10S
Number of frequencies 10
3016.0 3404.0 5583.0 6535.0 8921.0 10084.0 11327.0 13351.0 17916.0 21949.0
Ground Station ID 6 HAT YAI - THAILAND
Longitude 100-23-24E Latitude 06-56-23N
3470.0 4687.0 5655.0 6535.0 8825.0 10066.0 13270.0 17928.0 21949.0
Ground Station ID 7 SHANNON - IRELAND
Longitude 08-55-46W Latitude 52-43-48N
2998.0 3455.0 5547.0 6532.0 8843.0 8942.0 10081.0 11384.0 21928.0
Ground Station ID 8 JOHANNESBURG - SOUTH AFRICA
Longitude 28-12-35E Latitude 26-07-46S
3016.0 4681.0 8834.0 13321.0 21949.0
Ground Station ID 9 BARROW - ALASKA
Longitude 156-46-46W Latitude 71-18-00N
2944.0 2992.0 3007.0 3497.0 4654.0 4687.0 5529.0 5538.0 5544.0 6646.0 8927.0 8936.0 10027.0 10093.0 11354.0 17919.0 17934.0 21928.0 21937.0
Ground Station ID 14 KRASNOYARSK - RUSSIA
Longitude 92-18-00E Latitude 56-06-00N
2878.0 2905.0 4679.0 5622.0 6596.0 8886.0 10087.0 13321.0 17912.0 21990.0
Ground Station ID 13 SANTA CRUZ - BOLIVIA
Longitude 63-07-46W Latitude 17-40-11S
2983.0 3467.0 4660.0 6628.0 8957.0 11318.0 13315.0 17916.0 21946.0 21973.0 21988.0 21997.0
Ground Station ID 16 AGANA - GUAM
Longitude 144-48-00E Latitude 13-28-11N
6550.0 6634.0 6652.0 6661.0 8912.0 8927.0 8936.0 11288.0 11306.0 13276.0 13312.0 13339.0 17919.0 17934.0
Ground Station ID 15 AL MUHARRAQ - BAHRAIN
Longitude 50-39-00E Latitude 26-16-12N
2986.0 5544.0 8885.0 10075.0 11312.0 13354.0 17967.0 21982.0
Ground Station ID 17 CANARIAS - SPAIN
Longitude 15-23-23W Latitude 27-56-59N
2905.0 5589.0 6529.0 8948.0 11348.0 13303.0 17928.0 21955.0
