First Results for the TBBCERTO Radio Beacon Measurements - PowerPoint PPT Presentation

Title: First Results for the TBBCERTO Radio Beacon Measurements


1
First Results for the TBB/CERTO Radio Beacon
Measurements

• Paul A. Bernhardt
• Plasma Physics Division
• Naval Research Laboratory
• Washington, DC 20375
• With Contribution From Steven Franke (UIUC),
  Trevor Gardner (ARL/UT), Gary Bust (ARA), Jim
  Secan (NWRA), Martin Prochazka (Northrop
  Grumman), L-C Tsai (NCU)

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TBB/CERTO Overview

• Overview of TBB/CERTO
• Status of Transmissions
• 150 MHz, 400 MHz, 1066 2/3 MHz
• Interference with GOX
• Antenna Pattern for TBB L-Band
• Evaluation by UIUC
• Ground Receiver Sites
• Chung-Li, Taiwan
• ARL Univ. of Texas
• NWRA
• Air Force RADCAL Network
• NRL Progress
• Conclusions

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NRL Radio Beacon Sensors
DMSP/F15 1998
SEEK2 Rockets August 2002
CERTO on ARGOS
CERTO on PICOSat (2001-2005)
(1999-2001)
Past
CERTO/TBB on COSMIC (2006)
CERTO on C/NOFS (2008)
EQUARS (2008)
CITRIS on STPSAT1 (2006)
CERTO/LP on NPSAT1 (2006)
CASSIOPE (2007)
Future
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NRL CERTO Radio Beacons and CITRIS Receiver for
Ionospheric Tomography
INCLINATION
Check Out
Operation
Extended Operation
SATELLITE
98.6? DMSP/F15
862
80? CASSIOPE/EPOP
325 x 1500
70? COSMIC 6
800
70? COSMIC 5
800
70? COSMIC 4
800
70? COSMIC 3
800
70? COSMIC 2
800
70? COSMIC 1
800
35? NPSAT1
560
CITRIS Receiver
35? STPSAT1
560
20? EQUARS
750
15? C/NOFS
375 x 700
2006
2007
2008
2009
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CERTO Beacon Orbits

• Global Coverage
• Ten New Beacon Satellites
• 6 COSMIC Satellites First Launch of Tri-Band
  Beacon System

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Radar and Radio-Telescope Sites Supporting CERTO
Beacons with Ionospheric Measurements
.
.
AMISR Poker Flat
.
VLA
MU RADAR
STPSAT1 Orbit Boundary
COSMIC Orbit Boundary
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COSMIC Satellite Instruments and Mechanisms
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150 MHz Antenna Pattern for TBB/CERTO Beacons
Receivers
10 dB
0 dB
Angle From Boom Axis
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TBB/CERTO 150 MHz Circular Polarization
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400 MHz Antenna Pattern for TBB/CERTO Beacons
Receivers
10 dB
0 dB
Angle From Boom Axis
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CITRIS 400 MHz Circular Polarization
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1067 MHz Antenna Pattern for TBB/CERTO Beacons
Receivers
10 dB
0 dB
Angle From Boom Axis
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TBB/CERTO 1067 MHz Circular Polarization
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TBB/CERTO Antenna Pattern Summary

• Good Phase and Amplitude Match at 150 and 400 MHz
• Acceptable Performance at 1067 MHz

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UIUC 150 MHz Discone Antenna

• 150 MHz Antenna
• Set Up to Record COSMIC TBB/CERTO
• Vertically Polarized Discone
• Elevated 40' on Push-Up  Pole
• Located at Champaign-Urbana

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COSMIC TBB 150 MHz Signal Doppler

• Doppler Spectrogram
• 150.012 MHz beacon  from FORMOSAT C
• 16 Minute Time Period Starting 0236 UT on 10/2/06
• Time runs from left to right.
• Doppler frequency runs vertically.
• 4 kHz Around Center Frequency
• 2048 Point FFT size
• 8 Hz Doppler Resolution
• Weak Sidebands Probably from Downconverter

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COSMIC TBB Signal 150 MHz Carrier-to-Noise Steve
Franke, UIUC

• Carrier Strength
• Carrier Plus Noise in 8 Hz Band
• Peak Carrier/Noise Ratio
• 25 dB with 8 Hz BW
• 34 dB with 1 Hz BW
• Very  Healthy Signal
• Good for High-Quality TEC Measurements
• Larger Than Expected Variability Signal Strength
• Possible Source Polarization Fading and Elevation
  Lobes in Discone
• Better Ground Antenna Needed for Scintillation
  Measurements

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Chung-Li COSMIC TBB/CERTO Amplitude
28 1

• 13 October 2006, 2013 UT
• Amplitude Variations Along Satellite Orbit Track
• E- and F-Layer Projections of Orbit

Signal Strength (dB)
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Chung-Li COSMIC TBB/CERTOAmplitude and Phased
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Chung-Li COSMIC TBB/CERTOTEC and Elevation Angle
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Coherent Ionospheric Doppler Receiver (CIDR)
Systems

• Diamonds indicate ARLUT CIDR systems
• Triangles are NWRA ITS30 systems
• Future deployments are planned in New York and
  Columbia
• All Receivers only use 150 and 400 MHz TBB/COSMIC
  Transmissions

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Sample Pass for Receiver at theState University
of New York College at Oneonta

• TEC Measurement
• Slant TEC Converted to Vertical TEC
• Relative Measurement with Unknown Receiver Bias
• Pass Starts UT1038
• Nightside Trough
• From 44 to 45 GLAT
• Location 57 MLAT).

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Status of COSMIC Beacon Measurements by ARLUT

• CIDR systems in the American sector are presently
  measuring slant TEC with the COSMIC-CERTO beacon
  signals
• Efforts are underway to put the data on a public
  database
• For case studies, please contact
  garner_at_arlut.utexas.edu for slant TEC data

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Data Samples with CIDR and ITS10 Receivers19
August 2006, 1434 UTCordova and Delta Alaska
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Data Samples with CIDR and ITS10 Receivers19
August 2006, 1434 UT, Gakona Alaska
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Data Samples with CIDR and ITS10 Receivers19
August 2006, 0807 UT, Oneonta, NY
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Data Samples with CIDR and ITS10 Receivers19
August 2006, 0931 UT, Oneonta, NY
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Data Samples with CIDR and ITS10 Receivers19
August 2006, 1043 UT, Oneonta, NY
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Data Samples with CIDR and ITS10 Receivers19
August 2006, 1803 UT, Oneonta, NY
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Data Samples with CIDR and ITS10 Receivers19
August 2006, 1929 UT, Oneonta, NY
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NRL Campaigns for TBB/CERTO Measurements

• Alaska (31 July to 10 August)
• Chistochina Station ITS30 not Working
• Gakona Alaska ITS10 Work Fine
• Conjunction with HAARP Heating Experiments
• Kwajalein (September 2006)
• Radar Support
• VHF at 158 MHz
• UHF at 422 MHz
• NWRA ITS30 Receivers
• Kwajalein (Not Working)
• Roi Namor (Not Working)
• SCION Receivers not Ready

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RADCAL Observations of TBB/CERTO

• Air Force RADCAL Receiver Network
• 20 Magnavox MX 1502 DS Receiver Sites
• Records TEC from 150 and 400 MHz for RADCAL and
  GFO
• Support for TBB/CERTO Available Upon Request
• NRL Writing Data Conversion Software for RADCAL
  Format

33
Near Term NRL CERTO Receiver Additions to Support
the COSMIC Satellites

• Current Receivers on Order
• 2 SCION-3
• 2 NWRA ITS30-3
• 4 ARLUT CIDR
• Pan American Tomography Array (PATA-1)
• 5 Receivers between Jicamarca and Arecibo
• PATA1 Aligned with COSMIC Ascending Orbit
• Pan American Tomography Array (PATA-2)
• 5 Receivers between Manaus and Ottawa
• PATA2 Aligned with COSMIC Descending Orbit

Chesapeake, Virginia
COSMIC Satellite Orbits
PATA2
Arecibo, Puerto Rico
PATA1
HRTA
Ancon, Peru
C/NOFS Orbit
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Summary

• TBB/CERTO Radio Beacon
• Dual Frequency 150/400 MHz Receivers
• TEC Data and Radio Scintillations
• Existing US Tomography Chains N-S Configuration
  not Usable with COSMIC
• 36 Ground Receivers in Operation with US Support
• 9 ARLUT 6 NWRA 20 USAF RADCAL
• 1 UIUC Spectrum Monitor
• No Tri-Band Receivers in Operation
• Future Plans
• NRL 8 Tri-Band Receivers in 2007, 10 More in 2008
• University Projects for Receiver Development
• UIUC Prof. Steven Franke
• Clemson University Prof. Miguel Larsen
• Virginia Tech Dr. Brent Ledvina
• Collaborative Efforts
• TIP and TBB for Scintillation Studies
• GOX and TBB for Radio Tomography