Links:
Punta Salinas radar specs.
Table of frequency channels.
18may11: a2335 sees
rfi at 1367 Mhz (punta salinas chan 18)
19jul06: punta salinas radar blanking
test
26feb05:
punta salinas not staying in mode A
17nov04:
punta salinas runs with chn 18 (1367/1382)
on during the night.
06oct04:
faa,punta salinas, and aerostat Radars.
total power versus time.
04apr03.
Radar power levels in the downstairs
IF (1290,1330/1350,punta salinas.
| Transmitter | AN/FPS-117 frequency agile radar |
| Rf frequencies | see freq table |
| Peak power | 25.766 Kw (min power 24.75 Kw). |
| Pulse (Usecs) | short range (SR): 51.2 long range (LR): 409.6 |
| Ipps (usecs) | Because of the frequency and vertical hopping, it's hard to
nail down
the ipps. My current guesses are: Short Range: [1342,1415,1494,1674] Long Range:[2500 to 2800] |
| Bandwidth (Mhz) | SR: 1.25 LR: .625 |
| Freq modes | One channel (two frequencies separated by 15 Mhz) is
transmitted on
each ipp. It can Freq hop between 1 of 18 channels on an ipp by ipp basis. They are authorized to use 11 of these 18 channels. Typically runs in mode A (chan 3,4) or mode B (chan 6,7) |
| Rotation period | Nominally 12 seconds. Measured to by 12.019 seconds. It rotates clockwise north thru east. |
| Beam width | 2.2 degrees az 2.2 degrees vertical |
| Vertical hopping | vertically hops 18 to 22 beams. 10 of these beams are
"doppler beams"
(52usecs?). I think they hop 0 to 20 degrees vertically (although i'm not sure). |
| Blanking | The radar is blanked for +/- 45 degrees of azimuth centered on the arecibo direction (az=257). The radar also blanks for about 20 degrees when it points at the san juan airport (az=110) |
| Sidelobes | There are sidelobes at 40,60, and 80 degrees (decreasing in strength). |
| Location of radar | On the north shore of PR 6.2 km west of old san juan. |
| Misc | Down to 10 degree blanking, the strongest signals we receive are from plane echos rather than the radar sidelobes. We can also see planes circling the san juan airport. |
| SEE ALSO: |
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| 1 Sr N/A LR |
1214.495 -1215.445 1214.5074-1215.1325 |
1222.32 | 1229.495 -1230.445 1229.5075-1230.1325 |
| 2 SR LR |
1223.155 -1224.405 1223.4675-1224.0925 |
1231.28 | 1238.455 -1239.405 1238.4675-1239-0925 |
| 3 SR modeA LR |
1232.115 -1233.365 1232.4275-1233.0525 |
1240.24 | 1247.115 -1248.365 1247.4275-1248.0525 |
| 4 SR modeA LR |
1241.075 -1242.325 1241.3875-1242.0125 |
1249.20 | 1256.075 -1257.325 1256.3875-1257.0125 |
| 5 SR LR |
1250.035 -1251.285 1250.3475-1250.9725 |
1258.16 | 1265.035 -1266.285 1265.3475-1265.9725 |
| 6 SR modeB LR |
1258.995 -1260.245 1259.3075-1259.9325 |
1267.12 | 1273.995 -1275.245 1274.3075-1274.9325 |
| 7 SR modeB LR |
1267.995 -1269.205 1268.2675-1268.8925 |
1276.08 | 1282.995 -1284.205 1283.2675-1283.8925 |
| 8 SR LR |
1276.915 -1278.165 1277.2275-1277.8525 |
1285.04 | 1291.915 -1293.165 1292.2275-1292.8525 |
| 9 SR LR |
1285.875 -1287.125 1286.1875-1286.8125 |
1294.0 | 1300.875 -1302.125 1301.1875-1301.8125 |
| 10 SR modeC LR |
1294.835 -1296.085 1295.1475-1295.7725 |
1302.96 | 1309.835 -1311.085 1310.1475-1310.7725 |
| 11 SR modeC LR |
1303.795 -1305.045 1304.1075-1304.7325 |
1311.92 | 1318.795 -1320.045 1319.1075-1319.7325 |
| 12 SR LR |
1312.755 -1314.005 1313.0675-1313.6925 |
1320.88 | 1327.755 -1329.005 1328.0675-1328.6925 |
| 13 SR LR |
1321.715 -1322.965 1322.0275-1322.6525 |
1329.84 | 1336.715 -1337.965 1337.0275-1337.6525 |
| 14 SR LR |
1330.675 -1331.925 1330.9875-1331.6125 |
1338.80 | 1345.675 -1346.925 1345.9875-1346.6125 |
| 15 SR LR |
1339.635 - 1340.885 1339.9475-1340.5725 |
1347.76 | 1354.635 -1355.885 1354.9475-1355.5725 |
| 16 SR LR |
1348.595 - 1349.845 1348.9075-1349.5325 |
1356.72 | 1363.595 -1364.845 1363.9075-1364.5325 |
| 17 SR LR |
1357.555 - 1358.805 1357.8675-1358.4925 |
1365.68 | 1372.555 -1373.805 1372.8675-1373.4925 |
| 18 SR LR |
1366.515 -1367.765 1366.8275-1367.4525 |
1374.64 | 1381.515 -1382.765 1381.8275-1382.4525 |
| 19 SR LR |
1375.475 -1376.725 1375.7875-1376.4125 |
1383.60 | 1390.475 -1391.725 1390.7875-1391.4125 |
| 20 SR LR |
1384.435 - 385.685 1384.7475-385.3725 |
1392.56 | 1399.435 -1400.685 1399.7475-1400.3725 |