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Click on one of the station locations on the map to the right, or click on one of the callsigns from the list below, or enter an APRS callsign from aprs.fi and click 'Track' to view the 3-D track of the station on Google Earth. Click on 'Fly' to travel along the path
Callsign


Edit the the flight path:
Camera tilt
Travel time between points
Driving Mode 2x Altitude

Recent plane tracks

<tr><td><a href="javascript:void(0)" onClick="track_station_link('T-KTLH3','00:00:00:10')">T-KTLH3</a></td><td>00:00:00:10</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('KG7BDA','00:00:00:34')">KG7BDA</a></td><td>00:00:00:34</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('KG7BDA','00:00:00:51')">KG7BDA</a></td><td>00:00:00:51</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N453X','00:00:01:12')">N453X</a></td><td>00:00:01:12</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N453X','00:00:01:12')">N453X</a></td><td>00:00:01:12</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('FAMO','00:00:01:26')">FAMO</a></td><td>00:00:01:26</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('FAGG','00:00:02:01')">FAGG</a></td><td>00:00:02:01</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('LKCB','00:00:02:11')">LKCB</a></td><td>00:00:02:11</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('LFSP','00:00:02:44')">LFSP</a></td><td>00:00:02:44</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('BI4NPP-7','00:00:04:02')">BI4NPP-7</a></td><td>00:00:04:02</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('EFVA','00:00:05:20')">EFVA</a></td><td>00:00:05:20</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('ZA-0002','00:00:06:00')">ZA-0002</a></td><td>00:00:06:00</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('FAJP','00:00:06:05')">FAJP</a></td><td>00:00:06:05</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('ZA-0186','00:00:06:20')">ZA-0186</a></td><td>00:00:06:20</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('FAPX','00:00:06:30')">FAPX</a></td><td>00:00:06:30</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('FACF','00:00:11:43')">FACF</a></td><td>00:00:11:43</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('YG3EEY-5','00:00:14:16')">YG3EEY-5</a></td><td>00:00:14:16</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('SSCN','00:00:18:21')">SSCN</a></td><td>00:00:18:21</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('BI4NQD-10','00:00:25:02')">BI4NQD-10</a></td><td>00:00:25:02</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('LKTO','00:00:25:20')">LKTO</a></td><td>00:00:25:20</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('BI3AO','00:00:25:46')">BI3AO</a></td><td>00:00:25:46</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('ZS5SID-11','00:01:09:55')">ZS5SID-11</a></td><td>00:01:09:55</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('JH3NGC-11','00:05:04:57')">JH3NGC-11</a></td><td>00:05:04:57</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('VA3WDC-9','00:05:57:34')">VA3WDC-9</a></td><td>00:05:57:34</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('KF6BBT-11','00:06:01:08')">KF6BBT-11</a></td><td>00:06:01:08</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('KB2UIE','00:06:18:29')">KB2UIE</a></td><td>00:06:18:29</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('KA7PHJ-11','00:06:35:01')">KA7PHJ-11</a></td><td>00:06:35:01</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('BI3XKB-7','00:06:38:13')">BI3XKB-7</a></td><td>00:06:38:13</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N795TB','00:07:15:23')">N795TB</a></td><td>00:07:15:23</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('EA5JLN','00:08:26:04')">EA5JLN</a></td><td>00:08:26:04</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('K4NEW-7','00:10:02:02')">K4NEW-7</a></td><td>00:10:02:02</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('K4NEW-7','00:10:14:43')">K4NEW-7</a></td><td>00:10:14:43</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N822GT','00:11:22:00')">N822GT</a></td><td>00:11:22:00</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('K4NEW-3','00:12:12:38')">K4NEW-3</a></td><td>00:12:12:38</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('K4NEW-3','00:12:24:40')">K4NEW-3</a></td><td>00:12:24:40</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('KJ7HGV-7','00:12:29:59')">KJ7HGV-7</a></td><td>00:12:29:59</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N814RV','00:13:07:47')">N814RV</a></td><td>00:13:07:47</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('SA7BNT-5','00:13:26:14')">SA7BNT-5</a></td><td>00:13:26:14</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('K2ATL-10','00:13:30:14')">K2ATL-10</a></td><td>00:13:30:14</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('IE7BIN-5','00:14:21:42')">IE7BIN-5</a></td><td>00:14:21:42</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('IE7BIN-5','00:14:53:14')">IE7BIN-5</a></td><td>00:14:53:14</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N4JSW-12','00:15:17:22')">N4JSW-12</a></td><td>00:15:17:22</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('KF2YV-11','00:15:18:42')">KF2YV-11</a></td><td>00:15:18:42</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('KF2YV-11','00:15:24:32')">KF2YV-11</a></td><td>00:15:24:32</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N3NU','00:15:34:46')">N3NU</a></td><td>00:15:34:46</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('9W2FAS-5','00:18:13:05')">9W2FAS-5</a></td><td>00:18:13:05</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('BA7NEG-10','00:18:30:09')">BA7NEG-10</a></td><td>00:18:30:09</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N792F','01:00:55:02')">N792F</a></td><td>01:00:55:02</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('F4FVX-11','01:01:58:57')">F4FVX-11</a></td><td>01:01:58:57</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('BD4TMN-10','01:04:17:38')">BD4TMN-10</a></td><td>01:04:17:38</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('EB1EEY','01:07:28:20')">EB1EEY</a></td><td>01:07:28:20</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('9W2TWC-9','01:07:28:20')">9W2TWC-9</a></td><td>01:07:28:20</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('9M2ZAK-5','01:07:51:13')">9M2ZAK-5</a></td><td>01:07:51:13</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N901EN','01:08:28:35')">N901EN</a></td><td>01:08:28:35</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N457RV','01:08:34:18')">N457RV</a></td><td>01:08:34:18</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('KB7AZ-11','01:08:43:22')">KB7AZ-11</a></td><td>01:08:43:22</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('KB7AZ-11','01:10:23:50')">KB7AZ-11</a></td><td>01:10:23:50</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N88BW','01:10:46:10')">N88BW</a></td><td>01:10:46:10</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N88BW','01:10:53:32')">N88BW</a></td><td>01:10:53:32</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('VA7FBT','01:12:01:06')">VA7FBT</a></td><td>01:12:01:06</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('AD7ZJ-11','01:12:15:09')">AD7ZJ-11</a></td><td>01:12:15:09</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('EA1ISE-7','01:12:16:56')">EA1ISE-7</a></td><td>01:12:16:56</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('EA1ISE-7','01:12:31:25')">EA1ISE-7</a></td><td>01:12:31:25</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N374LK','01:13:31:33')">N374LK</a></td><td>01:13:31:33</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N374LK','01:13:39:00')">N374LK</a></td><td>01:13:39:00</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N4224','01:14:00:51')">N4224</a></td><td>01:14:00:51</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N7965A','01:14:21:52')">N7965A</a></td><td>01:14:21:52</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N767GS','01:15:36:09')">N767GS</a></td><td>01:15:36:09</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('WA7ARK-9','01:17:47:11')">WA7ARK-9</a></td><td>01:17:47:11</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('KJ4NNC','01:18:22:58')">KJ4NNC</a></td><td>01:18:22:58</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N789PH','01:21:27:57')">N789PH</a></td><td>01:21:27:57</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N18PF','02:03:00:44')">N18PF</a></td><td>02:03:00:44</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N924EN','02:06:06:28')">N924EN</a></td><td>02:06:06:28</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N326DB','02:07:35:52')">N326DB</a></td><td>02:07:35:52</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N141JA','02:08:35:22')">N141JA</a></td><td>02:08:35:22</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('CFCST','02:13:44:28')">CFCST</a></td><td>02:13:44:28</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('CFCST','02:17:25:50')">CFCST</a></td><td>02:17:25:50</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('VU3CQM-10','02:17:39:33')">VU3CQM-10</a></td><td>02:17:39:33</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('VU3CQM-10','03:02:06:51')">VU3CQM-10</a></td><td>03:02:06:51</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('BD8EIG-9','03:02:07:03')">BD8EIG-9</a></td><td>03:02:07:03</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('BD8EIG-9','03:02:07:16')">BD8EIG-9</a></td><td>03:02:07:16</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('BH6PHA-5','03:02:07:16')">BH6PHA-5</a></td><td>03:02:07:16</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('VA6XDO-7','03:02:07:32')">VA6XDO-7</a></td><td>03:02:07:32</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('BD6JN-4G','03:02:07:34')">BD6JN-4G</a></td><td>03:02:07:34</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('KJ7KJK-11','03:05:01:59')">KJ7KJK-11</a></td><td>03:05:01:59</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('WA6RNX','03:06:03:56')">WA6RNX</a></td><td>03:06:03:56</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N218MR','03:07:55:12')">N218MR</a></td><td>03:07:55:12</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('RPMG','03:08:55:58')">RPMG</a></td><td>03:08:55:58</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('LZ3SAM','03:10:51:59')">LZ3SAM</a></td><td>03:10:51:59</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N613FT','03:11:29:10')">N613FT</a></td><td>03:11:29:10</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N609FT','03:21:43:41')">N609FT</a></td><td>03:21:43:41</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N7266D','04:01:31:45')">N7266D</a></td><td>04:01:31:45</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N627FT','04:12:04:59')">N627FT</a></td><td>04:12:04:59</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N636FT','04:13:55:18')">N636FT</a></td><td>04:13:55:18</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N624FT','04:15:27:02')">N624FT</a></td><td>04:15:27:02</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('CFQLT','04:17:12:26')">CFQLT</a></td><td>04:17:12:26</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N962MC','04:19:09:09')">N962MC</a></td><td>04:19:09:09</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N8JL','05:01:01:03')">N8JL</a></td><td>05:01:01:03</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N910LL','05:05:17:39')">N910LL</a></td><td>05:05:17:39</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N75JA','05:07:21:40')">N75JA</a></td><td>05:07:21:40</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N6279G','05:08:07:52')">N6279G</a></td><td>05:08:07:52</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('BH2WUX-1','05:08:09:25')">BH2WUX-1</a></td><td>05:08:09:25</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('BH2WUX-1','05:08:52:22')">BH2WUX-1</a></td><td>05:08:52:22</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('JE6YMM-11','05:09:20:00')">JE6YMM-11</a></td><td>05:09:20:00</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N5ZKK-11','05:11:40:40')">N5ZKK-11</a></td><td>05:11:40:40</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('KE0HYJ-10','05:13:11:24')">KE0HYJ-10</a></td><td>05:13:11:24</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N157GS','05:13:19:57')">N157GS</a></td><td>05:13:19:57</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('F4BNZ-11','05:18:36:46')">F4BNZ-11</a></td><td>05:18:36:46</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('F4IZM-11','06:03:03:55')">F4IZM-11</a></td><td>06:03:03:55</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('BD3QAB-5','06:03:41:59')">BD3QAB-5</a></td><td>06:03:41:59</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('BD4TZY-9','06:06:52:06')">BD4TZY-9</a></td><td>06:06:52:06</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N821RP-9','06:08:28:41')">N821RP-9</a></td><td>06:08:28:41</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('BH3DHE-5','06:08:57:18')">BH3DHE-5</a></td><td>06:08:57:18</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N70AH','06:09:35:18')">N70AH</a></td><td>06:09:35:18</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('CFWFC','06:09:43:20')">CFWFC</a></td><td>06:09:43:20</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N88WN','06:11:39:48')">N88WN</a></td><td>06:11:39:48</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N87EM','06:11:43:20')">N87EM</a></td><td>06:11:43:20</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N87EM','06:14:49:05')">N87EM</a></td><td>06:14:49:05</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('KJ4ECK-2','06:15:41:28')">KJ4ECK-2</a></td><td>06:15:41:28</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('G6KSM-1','06:15:57:56')">G6KSM-1</a></td><td>06:15:57:56</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('ICA3FF883','06:16:53:08')">ICA3FF883</a></td><td>06:16:53:08</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N7723V','06:17:25:40')">N7723V</a></td><td>06:17:25:40</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('VK3CRI-7','06:18:11:43')">VK3CRI-7</a></td><td>06:18:11:43</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('K2ATL-7','06:19:19:56')">K2ATL-7</a></td><td>06:19:19:56</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('K2ATL-7','07:08:33:56')">K2ATL-7</a></td><td>07:08:33:56</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('KC0ALW-2','07:09:16:06')">KC0ALW-2</a></td><td>07:09:16:06</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N5771H','07:09:59:35')">N5771H</a></td><td>07:09:59:35</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N314RF','07:10:16:53')">N314RF</a></td><td>07:10:16:53</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('K4NEW-2','07:19:17:19')">K4NEW-2</a></td><td>07:19:17:19</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('K4NEW-2','08:08:28:53')">K4NEW-2</a></td><td>08:08:28:53</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N65XX','08:09:00:40')">N65XX</a></td><td>08:09:00:40</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('VE7MUB-7','08:10:07:42')">VE7MUB-7</a></td><td>08:10:07:42</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('VA3AIV','08:11:17:42')">VA3AIV</a></td><td>08:11:17:42</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('EA3EQD-5','08:11:21:43')">EA3EQD-5</a></td><td>08:11:21:43</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N44PH','08:16:33:01')">N44PH</a></td><td>08:16:33:01</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N44PH','08:22:00:00')">N44PH</a></td><td>08:22:00:00</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('LA2GLA-8','09:04:46:45')">LA2GLA-8</a></td><td>09:04:46:45</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('ICA3FFC12','09:06:46:37')">ICA3FFC12</a></td><td>09:06:46:37</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('EA1HXY-7','09:07:27:51')">EA1HXY-7</a></td><td>09:07:27:51</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('VK2NMZ-11','09:08:26:23')">VK2NMZ-11</a></td><td>09:08:26:23</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('K4NEW-1','09:08:30:07')">K4NEW-1</a></td><td>09:08:30:07</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('VK3CRI-11','09:09:18:15')">VK3CRI-11</a></td><td>09:09:18:15</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('N426KF','09:13:05:08')">N426KF</a></td><td>09:13:05:08</td></tr> <tr><td><a href="javascript:void(0)" onClick="track_station_link('S51TA','09:20:03:45')">S51TA</a></td><td>09:20:03:45</td></tr>
callsignlast seen

APRS, the Automatic Packet Reporting System, is an amateur radio based system that allows operators to report real-time position and other types of data. Particuarly interesting are position streams from high altitude balloons and other aeronautical projects. If you zoom in on a track, you can use the maps perspective control to see its change in altitude as well as position. To see a list of APRS stations that are moving, go to aprs.fi/moving