A heating facility for Jicamarca - Cornell University
A heating facility for Jicamarca - Cornell University
A heating facility for Jicamarca - Cornell University
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UAF meeting 2008 – p. 1/1<br />
A <strong>heating</strong> <strong>facility</strong> <strong>for</strong> <strong>Jicamarca</strong><br />
J. L. Chau, D. T. Farley, D. L. Hysell, W. E. Swartz<br />
Instituto Geofísico del Perú, Lima<br />
<strong>Cornell</strong> <strong>University</strong>, Ithaca, NY
UAF meeting 2008 – p. 2/1<br />
motivation<br />
— queried at various times by AFOSR, ONR, NRL, AFRL, NSF, others<br />
— why here, why now?<br />
General advantages of magnetic equator:<br />
relatively stable background conditions<br />
less absorption, more ionization<br />
equtorial electrojet more reliable than auroral electrojet<br />
Specific features:<br />
VLF/ELF generation<br />
artificial periodic inhomogeneities and spread F<br />
electrojet thermal parametric instabilities<br />
Langmuir turbulence
VLF/ELF generation<br />
UAF meeting 2008 – p. 3/1
VLF/ELF generation<br />
UAF meeting 2008 – p. 4/1
UAF meeting 2008 – p. 5/1<br />
VLF/ELF<br />
– Lunnen et al., Nature, 311(13), 134, 1984<br />
– N. Lehtinen, URSI GA, Chicago, Aug. 11–16, 2008<br />
– 2006 BAE Systems patent
UAF meeting 2008 – p. 6/1<br />
API<br />
<br />
<br />
<br />
<br />
– P. Bernhardt, J. Huba
UAF meeting 2008 – p. 7/1<br />
API<br />
– L. Erukhimov et al., Radiophys. Quant. Elect., 40 (1-2), 1997
UAF meeting 2008 – p. 8/1<br />
electrojet tpi<br />
Range (km)<br />
50 100 150<br />
| |<br />
19:50<br />
| | | | | | | | |<br />
20:00<br />
20:10<br />
UT (hrs) Mon Jul 30 2007<br />
20:20<br />
20:30<br />
-10 0 10 20 30<br />
SNR (db)<br />
-200 -100 0 100 200<br />
v (m/s)<br />
SNR (dB)<br />
-10 0 10 20 30<br />
| |<br />
19:50<br />
| | | | | | | | |<br />
20:00<br />
20:10<br />
UT (hrs) Mon Jul 30 2007<br />
20:20<br />
20:30<br />
Homer radar
UAF meeting 2008 – p. 9/1<br />
electrojet tpi<br />
-10 -5 0 5 10<br />
SNR (db)<br />
-200 -100 0 100 200<br />
v (m/s)<br />
SNR (dB)<br />
-10 -5 0 5 10<br />
Range (km)<br />
50 100 150<br />
|<br />
| | |<br />
| | |<br />
| |<br />
21:30<br />
22:00<br />
UT (hrs) Mon Jul 28 2008<br />
22:30<br />
|<br />
| | |<br />
| | |<br />
| |<br />
21:30<br />
22:00<br />
UT (hrs) Mon Jul 28 2008<br />
22:30<br />
Homer radar
UAF meeting 2008 – p. 10/1<br />
electrojet tpi<br />
Range (km)<br />
50 100 150<br />
| |<br />
19:49:00<br />
| | | |<br />
19:49:30<br />
UT (hrs) Mon Jul 30 2007<br />
-10 0 10 20 30<br />
SNR (db)<br />
-60 -40 -20 0 20 40 60<br />
v (m/s)<br />
SNR (dB)<br />
-10 0 10 20 30<br />
| |<br />
19:49:00<br />
| | | |<br />
19:49:30<br />
UT (hrs) Mon Jul 30 2007
Langmuir turbulence<br />
UAF meeting 2008 – p. 11/1
UAF meeting 2008 – p. 12/1<br />
implementation<br />
use surplus OTH transmitters (10), feed lines<br />
duplicate HIPAS crossed dipole antennas (9) 2Ω e ,3Ω e<br />
construct exciter/ control hardware locally (FPGA/DDS units)<br />
likewise HF receivers (Echotek)<br />
power improvement and conditioning<br />
upgrade diagnostics (AMISR-7, SEE receivers, VLF receivers,<br />
optics, magnetometer, ionosonde, ...)
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