Links:
Punta Salinas radar specs.
Table of frequency channels.
Punta salinas ModeA,modeB,modeC definitions
Coordination schedules sent to punta salinas
Lockheed-martin fps117 fact sheet
(.pdf)
apr15 : punta salinas
upgrades from 18 to 100 freq channels
20apr15: freq override by
sector (.pdf)
12dec13: punta salinas blanking
sector changes from 78 degrees to 22 degrees in around jun12
26nov13: check the duration of
the punta salinas blanking (in the AO direction).
02nov11:
puntasalinas creates intermods in alfa
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: |
| freq# |
chn1
xmit |
chn2
xmit |
|||
| loFrq |
hiFrq |
loFrq |
hiFrq |
||
| modeA |
14,40 |
1228.5 | 1243.5 | 1279.5 | 1294.5 |
| modeB |
14,54 |
1228.5 | 1243.5 | 1307.5 | 1322.5 |
| modeC |
40,52 |
1279.5 | 1294.5 | 1303.5 | 1318.5 |
| Dates
covered |
Revision:
dateSent |
| 140702-140716 |
a: 140623 |
| b: 140702 |
|
| c:140709 |
|
| 140716-140730 |
a:1407151 |
| 140730-140813 |
a:140730 |
| b:140804 |
|
| c:140805 |
|
| 140813-140827 |
a:140813 |
| b:140815 |
|
| c:140822 |
|
| 140827-140910 |
a:140822 |
| 140910-140924 |
a:140908 |
| b:140913 |
|
| 140924-141008 |
a:140917 b:140924 c:140926 |
| 141008-141022 |
a:141008 |
| 141022-141105 |
a:141016 b:141023 c:141103 |