Satgen407 Simple Sat Tracking Pt2 by GM4IHJ (BID SGEN407) 10 Jan 97 To construct a Polar plot for use with satellite EQX Equator Crossing times and Longitudes, you need the Amsat Polar centred great circle map, plus a long thick strip of plastic pinned through its centre to the centre pole of the map . So that it can be rotated around the pole. On this strip you mark out the Lat and Long West sat position every 2 minutes starting from the Equator. Typical tracks are :- Radio Sport 10 A X Radio Sport 12 KAT X Radio Sport 15 A Mi Lat Long Mi Lat Long Mi Lat Long Mi Lat Long Mi Lat Long Mi Lat Long 0 0 0 28 80 237 X 0 0 0 28 78 226X 0 0 0 34 64 266 2 6 359 30 76 217 X 2 8 359 30 72 211X 2 5 358 36 62 254 4 12 359 32 69 207 X 4 15 359 32 66 204X 4 10 356 38 59 244 6 19 359 34 62 202 X 6 22 358 34 59 201X 6 15 354 40 56 236 8 26 358 36 56 199 X 8 29 358 36 53 198X 8 20 352 42 52 229 10 33 357 38 50 198 X10 36 357 38 46 197X 10 25 350 44 48 223 12 35 357 40 43 196 X12 42 356 40 39 196X 12 30 347 46 43 219 14 46 356 42 36 195 X14 49 355 42 32 195X 14 35 344 48 39 215 16 53 354 44 29 195 X16 56 353 44 26 194X 16 39 341 50 34 211 18 60 352 46 23 194 X18 63 350 46 19 194X 18 44 337 52 29 208 20 66 348 48 16 194 X20 69 345 48 12 193X 20 48 333 54 24 206 22 73 341 50 9 193 X22 76 335 50 5 193X 22 52 327 56 18 203 24 79 325 52 2 193 X24 81 312 52 -2 193X 24 56 321 58 13 201 26 82 286 54 -5 193 X26 82 262 X 26 59 313 60 8 199 X X 28 62 303 62 3 197 Radio Sport 10 Track X Radio Sport 12 track X 30 64 291 64 -3 195 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 32 64 279 XXXXXXXXXXX Simply rotate the track around the map , until the equator zero minute mark on the track is on the equator at the EQX longitude west of the orbit you wish to follow. To see exactly when a point on the track first comes in range of your station , you need to have outlined the satellite footprint ellipse on the map centered on the position of your station , with the lowest latitude point af the footprint ellipse exactly south of your station ie on the same longitude meridian line as your station . Eg station at Greenwich 0 West would line this lowest point below the station along the 0 west meridian. Typical footprint outline points are :- 0W 80N 0W 60N 41W 75N 319W 75N 23W 55N 337W 55N 48W 70N RS 12 312W 70N 30W 50N RS 12 330W 50N 51W 65N Station 309W 65N 33W 45N Station 327W 45N 51W 60N at 309W 60N 35W 40N at 325W 40N 50W 55N 50N 310W 55N 35W 35N 30N 325W 35N 47W 50N 0W 313W 50N 35W 30N 0W 325W 30N 44W 45N 316W 45N 33W 25N 327W 25N 41W 40N 319W 40N 31W 20N 329W 20N 36W 35N 324W 35N 28W 15N 332W 15N 30W 30N 330W 30N 24W 10N 336W 10N 21W 25N 339W 25N 18W 5N 342W 5N 0W 20N 0W 0N Be careful. Shape+size of the footprint depends on station latitude, and which satellite. FTPRINT sware calculates any footprint, any LEO sat, any station.