A heating facility for Jicamarca - Cornell University

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A heating facility for Jicamarca
J. L. Chau, D. T. Farley, D. L. Hysell, W. E. Swartz
Instituto Geofísico del Perú, Lima
Cornell University, Ithaca, NY

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motivation
— queried at various times by AFOSR, ONR, NRL, AFRL, NSF, others
— why here, why now?
General advantages of magnetic equator:
relatively stable background conditions
less absorption, more ionization
equtorial electrojet more reliable than auroral electrojet
Specific features:
VLF/ELF generation
artificial periodic inhomogeneities and spread F
electrojet thermal parametric instabilities
Langmuir turbulence

VLF/ELF generation
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VLF/ELF generation
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VLF/ELF
– Lunnen et al., Nature, 311(13), 134, 1984
– N. Lehtinen, URSI GA, Chicago, Aug. 11–16, 2008
– 2006 BAE Systems patent

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API
– P. Bernhardt, J. Huba

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API
– L. Erukhimov et al., Radiophys. Quant. Elect., 40 (1-2), 1997

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electrojet tpi
Range (km)
50 100 150
| |
19:50
| | | | | | | | |
20:00
20:10
UT (hrs) Mon Jul 30 2007
20:20
20:30
-10 0 10 20 30
SNR (db)
-200 -100 0 100 200
v (m/s)
SNR (dB)
-10 0 10 20 30
| |
19:50
| | | | | | | | |
20:00
20:10
UT (hrs) Mon Jul 30 2007
20:20
20:30
Homer radar

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electrojet tpi
-10 -5 0 5 10
SNR (db)
-200 -100 0 100 200
v (m/s)
SNR (dB)
-10 -5 0 5 10
Range (km)
50 100 150
|
| | |
| | |
| |
21:30
22:00
UT (hrs) Mon Jul 28 2008
22:30
|
| | |
| | |
| |
21:30
22:00
UT (hrs) Mon Jul 28 2008
22:30
Homer radar

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electrojet tpi
Range (km)
50 100 150
| |
19:49:00
| | | |
19:49:30
UT (hrs) Mon Jul 30 2007
-10 0 10 20 30
SNR (db)
-60 -40 -20 0 20 40 60
v (m/s)
SNR (dB)
-10 0 10 20 30
| |
19:49:00
| | | |
19:49:30
UT (hrs) Mon Jul 30 2007

Langmuir turbulence
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implementation
use surplus OTH transmitters (10), feed lines
duplicate HIPAS crossed dipole antennas (9) 2Ω e ,3Ω e
construct exciter/ control hardware locally (FPGA/DDS units)
likewise HF receivers (Echotek)
power improvement and conditioning
upgrade diagnostics (AMISR-7, SEE receivers, VLF receivers,
optics, magnetometer, ionosonde, ...)