Automated Assimilation of Data from the Digisonde Network
Bodo Reinisch, Ivan Galkin, Grigori KhmyrovEnvironmental, Earth, and Atmospheric Sciences Department Center for Atmospheric ResearchUniversity of Massachusetts Lowell
COST271 Third Workshop, Spetses Island, Greece 23-27 September 2003
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Outline
Availability of sounder dataIonograms, drift, characteristics, profiles
Real time Internet accessSAO – ExplorerInteractive DIDBase
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Digisonde Network
Tromso
Chilton
Juliusruh
DourbesRome
AthensEl Arenosillo
Roquetes
NarssarssuaqSondrestrom
Qaanaaq
College
King Salmon
Goose Bay
Millstone Hill
Wallops Is.Pt.Arguello
Dyess AFB
Eglin
Jicamarca
Sao Luis
Cachoeira Paulista
Port Stanley
Grahamstown
Hainan Is.
Chung Li
OkinawaKokubunji
AnyangOsan
Bundoora
Gakona
Ascension Is.Fortaleza
San Vito
Wuhan
Fairford
Norilsk
Irkutsk
MadimboLouisvale
Elliott
Alice Springs
Wyndham
LearmonthSouth Hedland Lynd River
Kalkaringi
Curtin Base
BoolathanaAjana
LavertonLongreach
SchergerDarwin
Pontianak
IslamabadKarachi
Yakutsk
Zhigansk
Tucuman
Zhong Shan
Casey
Ramey
Santa Maria
Kenya
Hokkaido
Pruhonice
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Standard Ionogram Image with Autoscaling and Profile
Profile
Online
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Spread F Ionogram at Tromsø
(Courtesy Paul Cannon)
Online
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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.
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DIRECTOGRAM
Jicamarca 27 Nov 2002 (COPEX Campaign)
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Drift Explorer
Online access to database of digisonde drift dataSkymapsDrift Velocity plots
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Vx,Vz, Vy at Jicamarca March 21-26, 2003
Online
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Online
Pre-sunset reversal
Nighttimeeastward drift
Daytimewestward drift
Gravity waves?
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Jicamarca Skymap
Online
22:04 LT
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Jicamarca Skymap
Online
22:38 LT
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Online Real-Time Digisonde Stations
Tromso
Chilton
Juliusruh
DourbesRome
AthensEl Arenosillo
Roquetes
NarssarssuaqSondrestrom
Qaanaaq
College
King Salmon
Goose Bay
Millstone Hill
Wallops Is.Pt.Arguello
Dyess AFB
Eglin
Jicamarca
Sao Luis
Cachoeira Paulista
Port Stanley
Grahamstown
Hainan Is.
Chung Li
OkinawaKokubunji
AnyangOsan
Bundoora
Gakona
Ascension Is.Fortaleza
San Vito
Wuhan
Fairford
Norilsk
Irkutsk
Direct WWW access to real-time dataNear real-time publishing on a separate serverData available with 3-day delayPassword-protected access
MadimboLouisvale
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Data Access Scenarios
UMLDIDBDIDBaseOFFLINE
DIGISONDES
INTERNET ACCESS
ONLINE DIGISONDES
WWW
FTP
CD-ROM AND OTHER REMOVABLE MEDIA
U MASS LOWELL
SPIDRSPIDRSPIDRSPIDR
WORLD DATA CENTER
WWW
SQL
SQL
DIGISONDE OWNERS
FTP
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How to Access a Station?
Tromso
Chilton
Juliusruh
DourbesRome
AthensEl Arenosillo
Roquetes
NarssarssuaqSondrestrom
Qaanaaq
College
King Salmon
Goose Bay
Millstone Hill
Wallops Is.Pt.Arguello
Dyess AFB
Eglin
Jicamarca
Sao Luis
Cachoeira Paulista
Port Stanley
Grahamstown
Hainan Is.
Chung Li
OkinawaKokubunji
AnyangOsan
Bundoora
Gakona
Ascension Is.Fortaleza
San Vito
Wuhan
Fairford
Norilsk
Irkutsk
Direct WWW access to real-time dataNear real-time publishing on a separate serverData available with 3-day delayPassword-protected access
MadimboLouisvale
http://ulcar.uml.edu/framesn.htm
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Direct Access to Online Digisondes
Public:~ 1 week of images:
IonogramsDaily plots of drift velocitiesSkymapsDirectograms (soon)
Years of autoscaled SAO dataDaily 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
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WDC SPIDR
Public (WWW):Years of autoscaled SAO data (retro and near real-time)
Upon request:Raw data for selected locationsSome edited data
SQL queries:Some autoscaled SAO data
(SAO Explorer can access SPIDR for reading)
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DIDBase and SAO-X
Ionogram surveys
Contours
Profilogram
Char Table
Ionogram Editor
SAO Explorerdigisonde data visualization and editing tool
• online with DIDBase • offline with data files
Directogram
Characteristics Plot
SQL Queries“Best available”
SAO record (validated / autoscaled)
Data Subsetting
ADRESRequests for
validated SAO records
Requests of special campaign operating modes
DIDBase is anactive database (with online submissions of edited data from SAO-X workstations)
All access is password-protected
Read-only accessAll raw ionogram data Autoscaled SAO dataEdited SAO dataNear real-time data for
selected locations
Write accessOnline validation
(editing) of autoscaled data with SAO Explorer
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ADRES
ADRES
List of data for validation
DIDBase at UMLCAR
Digisondes
DIDBase Request Processor
Requests
Reports
Offline archives
Ionogram Scalerworkstations
AutomatedData RequestExecution System
USER
Online archives
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Summary
Internet access to 40 stationsIonogram and drift data
Ionogram and drift imagesIonogram and drift data filesSAO characteristics and profiles files
Interactive DIDBaseSQL requestsSAO-Explorer interface
WDC-A archives SAO files of selected sites
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Online
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Online
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Online
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Multi-beam Ionograms
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Features of a Modern Ionosonde
1-40MHz Frequency RangeLow Power (150 W pulse) Operation (Pulse Compression)GPS Time Synchronization (for oblique sounding)Electronically Switched O/X PolarizationAutomatic Fixed Gain Control (120 dB Dynamic Range)Frequency Search to Mitigate Interference Multi-Beam IonogramsDoppler Interferometry Drift MeasurementsReal-Time Automatic Ionogram ScalingInternet Access for Real Time Data and System Control