Station info - map view · info · telemetry · weather · raw · status · beacons · messages · bulletins · browse · moving · my account
Callsign, ship name or locator: Clear       
It is possible to search using wildcards (*?) after a prefix. Example: OH*
APRS station WT9M-5 - show graphs
Map loading...
Last status: WT9M UW Madison Digi and Wx using Tracker2
Location: 43°04.36' N 89°24.70' W - locator EN53HB07OK - show map - static map
0.5 miles West bearing 267° from Madison, Dane County, Wisconsin, United States [?]
1.7 miles East bearing 101° from Shorewood Hills, Dane County, Wisconsin, United States
57.6 miles North bearing 344° from Rockford, Winnebago County, Illinois, United States
Last position: 2020-10-21 22:02:52 CDT (3m22s ago)
2020-10-21 22:02:52 CDT local time at Madison, United States [?]
Last WX report: 2020-10-21 12:29:12 CDT (9h37m ago) – show weather charts
2 °F 49.9 mbar 0.0 MPH North
Last telemetry: 2020-09-20 01:56:10 CDT (31d 20h10m ago) – show telemetry
Ch 1: 78, Ch 2: 71, Ch 3: 255, Ch 4: 91, Ch 5: 71
 1     2     3     4     5     6     7     8 
Device: Argent Data Systems: OpenTracker (tracker)
Last path: WT9M-5>APOT21 via WIDE2-2,qAR,KC9TS-2 (good)
Positions stored: 564
Packet rate: 549 seconds between packets on average during 26904 seconds.
Other SSIDs: WT9M WT9M-6 WT9M-8
APRS digipeater – Statistics for 2020-10:
Stations heard directly: 68 on radio path – show map
Last heard a station directly: 2020-10-21 21:11:52 CDT (54m22s ago)
Normal receiver range estimate: 62 miles (Updated: 2020-10-21 20:13:37 CDT)
Position packets heard directly: 3324 on radio path
Stations near current position of WT9M-5 - show more
callsign distance last heard - CDT      callsign distance last heard - CDT
WT9M-60.0 yards 0°2020-10-08 21:10:29 WT9M0.0 yards 0°2020-09-23 07:45:24
K3HTK-70.5 miles 82°2020-10-14 07:18:05 KD9KJV1.0 miles 264°2020-10-08 12:11:14
N9EM-52.3 miles 70°2020-10-21 22:04:48 KD9DOE-92.6 miles 217°2020-10-21 20:15:09
KD9DOE2.7 miles 211°2020-10-20 19:35:03 KC9TS-22.8 miles 249°2020-10-21 21:42:29
KC9TS-12.8 miles 249°2020-10-21 21:56:57 KC9TS-72.8 miles 249°2020-10-17 11:30:48
KC9JVN-92.8 miles 249°2020-10-21 17:44:02 WW9H3.2 miles 221°2020-10-08 16:50:54
KC7OCF-53.4 miles 192°2020-10-21 20:34:33 444.475fm3.4 miles 245°2020-10-21 21:52:27
K9BFK B3.6 miles 59°2020-10-11 12:32:20 K9BFK-B3.6 miles 59°2020-10-11 12:32:30
KG9NF-93.8 miles 221°2020-10-21 18:25:51 KC9TS-33.9 miles 292°2020-10-17 11:08:22
W0SLJ4.3 miles 213°2020-10-21 16:16:25 FW36204.3 miles 101°2020-10-21 22:02:38
Stations which heard WT9M-5 directly on radio –
callsign pkts first heard - CDT last heard longest (tx => rx) longest at - CDT
N9QIP-4 1 2020-10-11 09:07:46 2020-10-11 09:07:46 EN53HB > EN43RV 80.6 miles 315° 2020-10-11 09:07:46
W9LTA-10 191 2020-10-01 22:26:10 2020-10-21 20:12:30 EN53HB > EN54FA 65.8 miles 354° 2020-10-21 20:12:30
KA9QPN-15 13 2020-10-08 20:49:41 2020-10-12 02:26:15 EN53HD > EN51QP 110.7 miles 158° 2020-10-11 04:45:12
NS9RC 1 2020-10-11 03:01:27 2020-10-11 03:01:27 EN53HB > EN62CC 106.1 miles 129° 2020-10-11 03:01:27
N9MEA-10 3 2020-10-05 06:05:16 2020-10-09 02:27:07 EN53HB > EN55EH 156.3 miles 356° 2020-10-09 02:27:07
N9MEA-11 2 2020-10-08 23:16:17 2020-10-11 22:28:20 EN53HB > EN54FN 101.8 miles 355° 2020-10-11 22:28:20
N9QIP-11 4 2020-10-02 15:21:26 2020-10-11 04:24:36 EN53HB > EN52LT 26.1 miles 136° 2020-10-11 04:24:36
N9MEA-14 2 2020-10-02 05:51:20 2020-10-02 06:21:36 EN53HB > EN55AQ 183.5 miles 351° 2020-10-02 06:21:36
KA9BAB-11 2 2020-10-04 19:45:07 2020-10-05 05:54:46 EN53HB > EN44UX 138.4 miles 341° 2020-10-05 05:54:46
K0HAM-10 2 2020-10-09 01:10:50 2020-10-09 03:36:51 EN53HB > EN41HS 134.3 miles 229° 2020-10-09 03:36:51
KA9BAB-6 7 2020-10-09 03:36:54 2020-10-14 20:32:21 EN53HB > EN53LT 54.8 miles 18° 2020-10-14 20:32:21
KC9FWE-10 2 2020-10-10 01:02:34 2020-10-14 17:45:48 EN53HB > EN53IT 49.9 miles 5° 2020-10-14 17:45:48
N9QIP-7 6 2020-10-08 23:05:01 2020-10-14 18:16:40 EN53HB > EN53OE 34.1 miles 75° 2020-10-14 18:16:40
N9UWY-1 7 2020-10-01 20:12:55 2020-10-11 11:56:13 EN53HB > EN44SN 116.1 miles 333° 2020-10-11 11:56:13
W9AZ-1 9 2020-10-09 00:18:21 2020-10-21 10:45:08 EN53HB > EN61BC 155.5 miles 149° 2020-10-21 10:45:08
W9AZ-2 1 2020-10-09 04:03:59 2020-10-09 04:03:59 EN53HB > EN61DK 141.2 miles 142° 2020-10-09 04:03:59
KB9SCT-10 2 2020-10-09 01:42:20 2020-10-21 12:18:51 EN53HB > EN43KB 85.2 miles 270° 2020-10-21 12:18:51
N9GPY-1 4 2020-10-11 00:45:41 2020-10-11 02:19:43 EN53HB > EN61SF 199.3 miles 129° 2020-10-11 02:19:43
WI9WIN-13 1 2020-10-06 14:18:04 2020-10-06 14:18:04 EN53HB > EN42WX 37.0 miles 260° 2020-10-06 14:18:04
KB9TEN 1143 2020-09-30 19:06:23 2020-10-21 12:29:12 EN53HB > EN53ID 6.7 miles 46° 2020-10-21 12:29:12
K8OEC-11 1 2020-10-11 10:01:36 2020-10-11 10:01:36 EN53HB > EN62VX 161.4 miles 91° 2020-10-11 10:01:36
W0MXW-3 1 2020-10-07 08:24:45 2020-10-07 08:24:45 EN53HB > EN33QW 171.9 miles 291° 2020-10-07 08:24:45
W0NE-1 34 2020-10-02 03:22:29 2020-10-12 03:18:12 EN53HB > EN43EW 125.4 miles 300° 2020-10-12 03:18:12
W8MAI-15 11 2020-10-08 20:18:44 2020-10-11 04:55:39 EN53HB > EN62VB 176.0 miles 112° 2020-10-11 04:55:39
N9EM 397 2020-10-01 20:39:30 2020-10-21 19:47:37 EN53HB > EN53JA 12.6 miles 111° 2020-10-21 19:47:37
N9EM-5 592 2020-10-01 20:49:52 2020-10-21 21:31:42 EN53HB > EN53HC 2.3 miles 70° 2020-10-21 21:31:42
W9DOR-9 1 2020-10-09 06:56:33 2020-10-09 06:56:33 EN53HB > EN64ES 147.1 miles 37° 2020-10-09 06:56:33
AA9NV 2 2020-10-20 03:52:06 2020-10-20 05:36:10 EN53HB > EN54KI 90.2 miles 10° 2020-10-20 05:36:10
K9DEW-1 1 2020-10-08 23:26:34 2020-10-08 23:26:34 EN53HB > EN71DQ 210.6 miles 116° 2020-10-08 23:26:34
KC9SQR-15 31 2020-10-02 21:44:46 2020-10-17 05:38:28 EN53HB > EN52LG 58.3 miles 163° 2020-10-17 05:38:28
K9IQP-13 43 2020-10-07 07:22:42 2020-10-11 09:38:58 EN53HB > EN62AH 91.1 miles 126° 2020-10-11 09:38:58
W9SM-1 17 2020-10-05 04:52:12 2020-10-13 01:27:55 EN53HB > EN55GB 137.0 miles 359° 2020-10-13 01:27:55
N8LVQ-10 2 2020-10-11 03:01:24 2020-10-11 03:22:10 EN53HB > EN56QB 211.1 miles 10° 2020-10-11 03:22:10
WI9ELK-10 93 2020-09-30 19:00:45 2020-10-07 03:14:14 EN53HB > EN52RM 57.4 miles 129° 2020-10-07 03:14:14
KD9FUR 5 2020-10-11 07:22:23 2020-10-21 05:52:27 EN53HB > EN44WQ 118.2 miles 342° 2020-10-21 05:52:27
W9AFB-9 1 2020-10-11 08:46:10 2020-10-11 08:46:10 EN53HB > EN52WM 75.9 miles 120° 2020-10-11 08:46:10
KC8RFE-3 1 2020-10-21 09:21:11 2020-10-21 09:21:11 EN53HB > EN50PA 213.1 miles 169° 2020-10-21 09:21:11
W0GQ-1 1 2020-10-09 04:08:02 2020-10-09 04:08:02 EN53HB > EN42DB 135.9 miles 240° 2020-10-09 04:08:02
W9NLS-2 3 2020-10-06 09:38:46 2020-10-19 19:23:31 EN53HB > EN53DR 46.7 miles 342° 2020-10-19 19:23:31
N9XKH-10 17 2020-10-01 14:04:17 2020-10-14 12:34:42 EN53HB > EN52IM 39.8 miles 173° 2020-10-14 12:34:42
AF9FA 121 2020-10-01 16:08:16 2020-10-21 14:45:03 EN53HB > EN53GE 8.6 miles 344° 2020-10-21 14:45:03
KD9MIL-10 1 2020-10-10 06:45:19 2020-10-10 06:45:19 EN53HB > EN54TG 97.4 miles 31° 2020-10-10 06:45:19
W9LRT-3 3 2020-10-10 21:48:50 2020-10-11 03:32:36 EN53HB > EN61OP 166.6 miles 125° 2020-10-11 03:32:36
KX9A-1 6 2020-10-08 20:28:59 2020-10-12 05:12:42 EN53HB > EN51SI 128.7 miles 157° 2020-10-12 05:12:42
KC9TS-2 509 2020-10-01 06:49:10 2020-10-21 22:02:52 EN53HB > EN53GB 2.8 miles 249° 2020-10-21 22:02:52
W9AUV 34 2020-10-02 04:45:15 2020-10-21 10:55:26 EN53HB > EN51TU 100.1 miles 147° 2020-10-21 10:55:26
WE9C0M-8 2 2020-10-11 09:40:01 2020-10-11 09:50:51 EN53HB > EN45HQ 204.6 miles 333° 2020-10-11 09:50:51
KC9QPJ-10 53 2020-10-07 05:49:07 2020-10-20 09:16:09 EN53HB > EN52LK 47.0 miles 156° 2020-10-20 09:16:09
KC9TS-1 323 2020-10-01 19:37:08 2020-10-19 09:19:07 EN53HB > EN53GB 2.8 miles 249° 2020-10-03 03:36:34
W8AGT-10 1 2020-10-09 04:49:38 2020-10-09 04:49:38 EN53HB > EN72AT 177.2 miles 94° 2020-10-09 04:49:38
WA9ECJ-15 1 2020-10-08 23:04:54 2020-10-08 23:04:54 EN53HB > EN51VX 98.1 miles 139° 2020-10-08 23:04:54
AB9PJ-1 2 2020-10-09 03:16:09 2020-10-12 01:16:53 EN53HB > EN54TX 142.1 miles 20° 2020-10-12 01:16:53
KC9UNZ-12 53 2020-10-01 19:37:05 2020-10-07 23:22:34 EN53HB > EN52GX 5.2 miles 186° 2020-10-07 23:22:34

Only position packets which were originated by the station are shown here. The range statistics show some extra long hops, because some digipeaters do not correctly add themselves to the digipeater path. Please check the raw packets.
Stations heard directly by WT9M-5
callsign pkts first heard - CDT last heard longest (rx => tx) longest at - CDT
W9LTA-10 210 2020-10-01 19:48:04 2020-10-19 09:17:46 EN54FA > EN53HB 65.8 miles 354° 2020-10-19 09:17:46
KA9QPN-15 1 2020-10-09 02:17:00 2020-10-09 02:17:00 EN51QP > EN53HB 106.4 miles 158° 2020-10-09 02:17:00
N9MEA-10 1 2020-10-11 04:26:30 2020-10-11 04:26:30 EN55EH > EN53HB 156.3 miles 356° 2020-10-11 04:26:30
AA9QF-14 8 2020-10-07 15:56:06 2020-10-15 10:11:30 EN53HG > EN53HB 13.0 miles 6° 2020-10-15 10:11:30
N4UCM-9 71 2020-09-30 19:05:09 2020-10-21 17:23:26 EN52KX > EN53HB 16.3 miles 114° 2020-10-16 08:16:48
KA9BAB-11 1 2020-10-10 22:27:17 2020-10-10 22:27:17 EN44UX > EN53HB 138.4 miles 341° 2020-10-10 22:27:17
VE4DS-14 3 2020-10-07 16:41:46 2020-10-09 19:44:01 EN53HE > EN53HB 9.1 miles 20° 2020-10-07 16:58:57
KA9BAB-6 88 2020-10-01 19:56:27 2020-10-19 09:19:02 EN53LT > EN53HB 54.8 miles 18° 2020-10-19 09:19:02
KB3HVP-14 2 2020-10-14 06:22:56 2020-10-14 06:43:03 EN53GH > EN53HB 15.8 miles 357° 2020-10-14 06:22:56
KC9FWE-10 10 2020-10-02 06:48:00 2020-10-19 07:48:22 EN53IT > EN53HB 49.9 miles 5° 2020-10-19 07:48:22
N9QIP-7 163 2020-09-30 22:37:36 2020-10-21 17:36:20 EN53OE > EN53HB 34.1 miles 75° 2020-10-21 17:36:20
N9NIC-9 18 2020-10-05 11:59:55 2020-10-19 09:18:28 EN53GL > EN53HB 29.2 miles 352° 2020-10-19 08:53:59
W9PVR-12 24 2020-09-30 22:13:47 2020-10-19 08:13:33 EN43SH > EN53HB 53.7 miles 288° 2020-10-19 08:13:33
N9UWY-1 1 2020-10-11 07:43:12 2020-10-11 07:43:12 EN44SN > EN53HB 116.1 miles 333° 2020-10-11 07:43:12
W9MQB 19 2020-10-01 21:13:58 2020-10-10 06:30:29 EN53OB > EN53HB 31.0 miles 93° 2020-10-10 06:30:29
KC9SDK-9 56 2020-09-30 22:03:41 2020-10-19 17:19:13 EN53DD > EN53HB 17.4 miles 282° 2020-10-02 16:29:10
N9OEW 46 2020-10-06 02:05:26 2020-10-20 21:19:14 EN53GH > EN53HB 17.3 miles 354° 2020-10-20 02:14:40
W9JAR-1 8 2020-10-19 06:47:57 2020-10-19 11:23:23 EN53GH > EN53HB 17.5 miles 354° 2020-10-19 11:23:23
KD9AER 9 2020-10-18 10:12:00 2020-10-18 18:23:17 EN52LS > EN53HB 29.1 miles 135° 2020-10-18 10:12:00
AK9F-9 4 2020-10-04 14:46:48 2020-10-04 19:04:48 EN53GI > EN53HB 18.4 miles 354° 2020-10-04 15:39:01
KC9QPJ-9 6 2020-10-09 14:19:04 2020-10-12 13:44:16 EN53GK > EN53HB 24.3 miles 352° 2020-10-12 13:36:10
KD9ACO-4 990 2020-10-01 19:31:39 2020-10-21 17:33:59 EN53IC > EN53HB 4.7 miles 59° 2020-10-21 17:33:59
N4UCM 38 2020-10-02 19:18:00 2020-10-19 08:34:40 EN53GE > EN53HB 9.3 miles 346° 2020-10-19 08:34:40
KG0KM 11 2020-10-05 09:10:15 2020-10-06 11:40:54 EN53GH > EN53HB 15.3 miles 359° 2020-10-05 09:10:15
AA9NV 1 2020-10-11 05:40:37 2020-10-11 05:40:37 EN54KI > EN53HB 90.2 miles 10° 2020-10-11 05:40:37
KD9AFB-9 4 2020-10-01 08:50:13 2020-10-13 13:09:23 EN53GH > EN53HB 15.3 miles 359° 2020-10-13 13:09:23
W0DDP-9 17 2020-10-14 07:34:00 2020-10-18 13:40:26 EN52LT > EN53HB 26.4 miles 137° 2020-10-16 15:35:38
W8ALC-9 7 2020-10-17 13:46:31 2020-10-17 14:32:45 EN52MR > EN53HB 31.7 miles 138° 2020-10-17 13:46:31
N9QIP-3 89 2020-10-02 16:30:31 2020-10-18 10:02:42 EN53IH > EN53HB 19.4 miles 23° 2020-10-06 19:08:19
KC9PZI-9 65 2020-10-02 14:48:31 2020-10-21 15:17:21 EN52IS > EN53HB 20.5 miles 164° 2020-10-02 15:41:35
N9UUP-9 59 2020-10-01 07:11:59 2020-10-21 07:28:57 DR92IH > EN53HB 2722.4 miles 358° 2020-10-15 16:43:59
N9VJ-9 26 2020-10-19 07:31:48 2020-10-21 17:11:17 EN53KC > EN53HB 15.9 miles 81° 2020-10-19 07:31:48
W9DGI-9 35 2020-09-30 19:08:02 2020-10-20 16:10:06 EN53HD > EN53HB 5.8 miles 19° 2020-10-20 16:10:06
N1SJK-9 24 2020-10-02 13:58:27 2020-10-03 17:28:53 EN52LT > EN53HB 27.5 miles 132° 2020-10-03 17:28:53
WW9H 33 2020-10-02 10:13:22 2020-10-08 16:44:52 EN53FB > EN53HB 5.8 miles 275° 2020-10-06 11:15:14
KB9JMH-9 37 2020-10-01 08:49:12 2020-10-10 16:02:29 EN52LU > EN53HB 24.3 miles 128° 2020-10-01 18:40:20
W9CBJ-9 10 2020-10-02 16:25:27 2020-10-04 11:28:54 EN53HG > EN53HB 14.0 miles 3° 2020-10-03 19:59:32
N9XKH-10 4 2020-10-03 04:14:50 2020-10-08 22:44:28 EN52IM > EN53HB 39.8 miles 173° 2020-10-08 22:44:28
AF9FA 25 2020-10-01 11:57:49 2020-10-21 09:26:42 EN53GE > EN53HB 8.6 miles 344° 2020-10-21 09:26:42
KD9JSX-14 14 2020-10-06 09:54:56 2020-10-21 09:32:30 EN52LR > EN53HB 31.0 miles 138° 2020-10-21 09:07:50
WX9EMT-9 8 2020-10-17 15:32:56 2020-10-17 22:05:16 EN53IH > EN53HB 17.5 miles 14° 2020-10-17 21:44:05
KC9KSM-14 5 2020-10-01 08:47:27 2020-10-21 13:13:04 EN53JA > EN53HB 9.0 miles 113° 2020-10-21 13:13:04
WX9KVH-9 1 2020-10-10 14:08:29 2020-10-10 14:08:29 EN53GA > EN53HB 3.8 miles 221° 2020-10-10 14:08:29
K9SAB 5 2020-10-16 11:53:01 2020-10-16 12:05:49 EN53HG > EN53HB 12.9 miles 6° 2020-10-16 12:05:49
K9FWH 1 2020-10-12 16:06:50 2020-10-12 16:06:50 EN53HB > EN53HB 4.0 miles 115° 2020-10-12 16:06:50
KC9TS-2 1 2020-10-21 13:13:04 2020-10-21 13:13:04 EN53GB > EN53HB 2.8 miles 249° 2020-10-21 13:13:04
N9VHT-9 308 2020-10-01 17:17:57 2020-10-21 21:11:52 EN52CX > EN53HB 18.6 miles 252° 2020-10-21 20:22:15
KC9TS-3 7 2020-10-08 15:50:37 2020-10-17 11:08:22 EN53GC > EN53HB 3.9 miles 292° 2020-10-17 11:08:22
KC9JVN-9 103 2020-10-01 15:03:22 2020-10-19 15:35:50 EN53JA > EN53HB 9.2 miles 116° 2020-10-08 13:38:39
KD9OGC-7 3 2020-10-08 07:52:43 2020-10-08 08:32:54 EN52LS > EN53HB 29.8 miles 136° 2020-10-08 07:52:43
KG9NF-9 187 2020-10-09 17:12:45 2020-10-21 18:15:02 EN52FV > EN53HB 15.3 miles 209° 2020-10-09 17:29:15
KD9KJV 1 2020-10-08 12:11:14 2020-10-08 12:11:14 EN53GB > EN53HB 1.0 miles 264° 2020-10-08 12:11:14
KC9LFD 68 2020-10-02 19:58:19 2020-10-03 19:54:12 EN53GH > EN53HB 17.5 miles 354° 2020-10-02 19:58:19
W9CVO-9 8 2020-10-17 00:24:56 2020-10-17 00:57:36 EN53GN > EN53HB 35.0 miles 355° 2020-10-17 00:57:36
WJ9H 1 2020-10-11 08:17:46 2020-10-11 08:17:46 EN42WX > EN53HB 36.5 miles 259° 2020-10-11 08:17:46
KG0KM-7 3 2020-10-05 09:12:47 2020-10-05 09:24:47 EN53HG > EN53HB 12.7 miles 7° 2020-10-05 09:12:47
KD9MFZ-5 142 2020-09-30 19:01:56 2020-10-08 04:30:01 EN53GB > EN53HB 2.8 miles 267° 2020-10-08 02:28:15
KD9PGV-2 9 2020-10-11 21:21:58 2020-10-14 22:09:13 EN53IC > EN53HB 7.8 miles 74° 2020-10-11 21:21:58
K9NSE-3 19 2020-10-12 13:08:41 2020-10-12 13:43:59 EN53GH > EN53HB 16.1 miles 357° 2020-10-12 13:43:59
KC9UNZ-11 2 2020-10-11 17:51:45 2020-10-12 03:53:18 EN52GX > EN53HB 5.2 miles 186° 2020-10-12 03:53:18
W9DJD-9 1 2020-10-15 11:24:24 2020-10-15 11:24:24 EN53UA > EN53HB 57.5 miles 92° 2020-10-15 11:24:24
KD9DOE-9 36 2020-10-16 19:06:05 2020-10-21 18:48:09 EN53FA > EN53HB 6.6 miles 244° 2020-10-21 16:04:25
KC9TVK-7 1 2020-10-17 14:50:12 2020-10-17 14:50:12 EN53FB > EN53HB 5.6 miles 277° 2020-10-17 14:50:12
WW9H-7 9 2020-10-19 10:53:05 2020-10-19 11:46:36 EN53FB > EN53HB 5.6 miles 262° 2020-10-19 10:53:05
KD9PUL-9 1 2020-10-12 18:51:22 2020-10-12 18:51:22 EN53GH > EN53HB 16.5 miles 356° 2020-10-12 18:51:22
KD9QEN-7 11 2020-10-09 13:48:52 2020-10-16 17:29:37 EN53GH > EN53HB 16.3 miles 356° 2020-10-16 17:09:43
KD0UYN-9 4 2020-10-04 14:59:59 2020-10-09 14:52:21 EN53GH > EN53HB 16.1 miles 357° 2020-10-04 14:59:59
KC9UNZ-12 141 2020-10-01 21:30:06 2020-10-11 09:15:38 EN52GX > EN53HB 5.2 miles 186° 2020-10-11 09:15:38

Only stations from which a position packet has been heard are shown here. The range statistics show some extra long hops, because some digipeaters do not correctly add themselves to the digipeater path. Please check the raw packets.
About this site
This page shows real-time information collected from the Automatic Position Reporting System Internet network (APRS-IS). APRS is used by amateur (ham) radio operators to transmit real-time position information, weather data, telemetry and messages over the radio. A vehicle equipped with a GPS receiver, a VHF transmitter or HF transceiver and a small computer device called a tracker transmits it's location, speed and course in a small data packet, which is then received by a nearby iGate receiving site which forwards the packet on the Internet. Systems connected to the Internet can send information on the APRS-IS without a radio transmitter, or collect and display information transmitted anywhere in the world.
User guide · FAQ · Blog · Discussion group · Linking to aprs.fi · AIS sites · Service status · Database statistics · Advertising on aprs.fi · Technical details · API · Change log · Planned changes · Credits and thanks · Terms Of Service · iPhone/iPad APRS