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Automated Assimilation of Data from the Digisonde Network

Automated Assimilation of Data from the Digisonde Network. Bodo Reinisch, Ivan Galkin, Grigori Khmyrov Environmental, Earth, and Atmospheric Sciences Department Center for Atmospheric Research University of Massachusetts Lowell.

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Automated Assimilation of Data from the Digisonde Network

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  1. Automated Assimilation of Data from the Digisonde Network Bodo Reinisch, Ivan Galkin, Grigori Khmyrov Environmental, Earth, and Atmospheric Sciences Department Center for Atmospheric Research University of Massachusetts Lowell COST271 Third Workshop, Spetses Island, Greece 23-27 September 2003

  2. Outline • Availability of sounder data • Ionograms, drift, characteristics, profiles • Real time Internet access • SAO – Explorer • Interactive DIDBase

  3. Digisonde Network Qaanaaq Tromso Zhigansk Sondrestrom Yakutsk Norilsk College Narssarssuaq Juliusruh Gakona Goose Bay Irkutsk Fairford Chilton King Salmon Dourbes Pruhonice Millstone Hill Rome Anyang San Vito Hokkaido Pt.Arguello Roquetes Osan Wallops Is. El Arenosillo Athens Islamabad Kokubunji Dyess AFB Wuhan Eglin Okinawa Karachi Chung Li Ramey Hainan Is. Pontianak Kenya Sao Luis Ascension Is. Fortaleza Kalkaringi Scherger Wyndham Jicamarca Darwin Curtin Base Lynd River Tucuman South Hedland Elliott Learmonth Cachoeira Paulista Longreach Boolathana Laverton Alice Springs Santa Maria Madimbo Ajana Louisvale Grahamstown Bundoora Port Stanley Zhong Shan Casey

  4. Standard Ionogram Imagewith Autoscaling and Profile Online Profile

  5. Spread F Ionogram at Tromsø Online (Courtesy Paul Cannon)

  6. Char Table Reinisch, B.W., SAO (Standard Archiving Output) format for ionogram scaled data archiving, INAG Bulletin No. 62, WDC-A for  STP, Boulder, CO, 47-58, 1998.

  7. DIRECTOGRAM Jicamarca 27 Nov 2002 (COPEX Campaign)

  8. Online access to database of digisonde drift data Skymaps Drift Velocity plots Drift Explorer

  9. Vx,Vz, Vy at Jicamarca March 21-26, 2003 Online

  10. Online Pre-sunset reversal Gravity waves? Daytime westward drift Nighttime eastward drift

  11. Jicamarca Skymap Online 22:04 LT

  12. Jicamarca Skymap Online 22:38 LT

  13. Online Real-Time Digisonde Stations Qaanaaq Tromso Norilsk Sondrestrom College Narssarssuaq Juliusruh Gakona Irkutsk Goose Bay Fairford Chilton King Salmon Dourbes Millstone Hill Rome Anyang San Vito Pt.Arguello Roquetes Osan Wallops Is. El Arenosillo Athens Kokubunji Dyess AFB Eglin Okinawa Wuhan Chung Li Hainan Is. Sao Luis Ascension Is. Fortaleza Jicamarca Cachoeira Paulista Madimbo Louisvale Grahamstown Bundoora Direct WWW access to real-time data Near real-time publishing on a separate server Data available with 3-day delay Password-protected access Port Stanley

  14. SPIDR SPIDR SPIDR SPIDR WORLD DATA CENTER ONLINE DIGISONDES SQL WWW WWW FTP FTP SQL OFFLINE DIGISONDES DIGISONDE OWNERS Data Access Scenarios UML DIDB DIDBase U MASS LOWELL INTERNET ACCESS CD-ROM AND OTHER REMOVABLE MEDIA

  15. How to Access a Station? http://ulcar.uml.edu/framesn.htm Qaanaaq Tromso Norilsk Sondrestrom College Narssarssuaq Juliusruh Gakona Fairford Irkutsk Goose Bay Chilton Dourbes King Salmon Millstone Hill Rome Anyang San Vito Pt.Arguello Roquetes Osan Wallops Is. El Arenosillo Athens Kokubunji Dyess AFB Eglin Okinawa Wuhan Chung Li Hainan Is. Sao Luis Ascension Is. Fortaleza Jicamarca Cachoeira Paulista Madimbo Louisvale Grahamstown Bundoora Direct WWW access to real-time data Near real-time publishing on a separate server Data available with 3-day delay Password-protected access Port Stanley

  16. Direct Access to Online Digisondes • Public: • ~ 1 week of images: • Ionograms • Daily plots of drift velocities • Skymaps • Directograms (soon) • Years of autoscaled SAO data • Daily plots of chars • Password protected: • ~ 1 week of raw data • (Latest 3 days are secured at USAF locations) • CD-ROM, QIC, Tape: • Backup of all data

  17. WDC SPIDR Public (WWW): Years of autoscaled SAO data (retro and near real-time) Upon request: Raw data for selected locations Some edited data SQL queries: Some autoscaled SAO data (SAO Explorer can access SPIDR for reading)

  18. Char Table • DIDBase is anactive database (with online submissions of edited data from SAO-X workstations) • All access is password-protected • Read-only access • All raw ionogram data • Autoscaled SAO data • Edited SAO data • Near real-time data for selected locations • Write access • Online validation (editing) of autoscaled data with SAO Explorer • SQL Queries • “Best available” SAO record (validated / autoscaled) • Data Subsetting • ADRES • Requests for validated SAO records • Requests of special campaign operating modes Profilogram Ionogram surveys Ionogram Editor Characteristics Plot Directogram Contours DIDBase and SAO-X • SAO Explorer • digisonde data visualization and editing tool • online with DIDBase• offline with data files

  19. ADRES ADRES Digisondes Online archives Offline archives Automated Data Request Execution System DIDBase at UMLCAR Requests DIDBase Request Processor Reports USER List of data for validation Ionogram Scaler workstations

  20. Summary • Internet access to 40 stations • Ionogram and drift data • Ionogram and drift images • Ionogram and drift data files • SAO characteristics and profiles files • Interactive DIDBase • SQL requests • SAO-Explorer interface • WDC-A archives SAO files of selected sites

  21. Online

  22. Online

  23. Online

  24. Multi-beam Ionograms

  25. Features of a Modern Ionosonde • 1-40MHz Frequency Range • Low Power (150 W pulse) Operation (Pulse Compression) • GPS Time Synchronization (for oblique sounding) • Electronically Switched O/X Polarization • Automatic Fixed Gain Control (120 dB Dynamic Range) • Frequency Search to Mitigate Interference • Multi-Beam Ionograms • Doppler Interferometry  Drift Measurements • Real-Time Automatic Ionogram Scaling • Internet Access for Real Time Data and System Control

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