Record Search Query: [Keyword='NOAA - Space Weather Program']
Solar Features - Solar Flares - SIDS
Entry ID: gov.noaa.ngdc.stp.solar.solar-features_solar-flares_sids

[ Get Data ]

Summary
Abstract: A Sudden Ionospheric Disturbance (SID) is any of several radio propagation anomalies due to ionospheric changes resulting from solar or geophysical events.

Purpose: To provide scientific data stewardship of solar-terrestrial datasets in compliance with NOAA Administrative Order (NAO) 212-15, "Management of Environmental and Geospatial Data and Information", dated 04 Nov 10. Scientific Data Stewardship includes the Archive, Access, and Assessment (AAA) of operational and related solar and space environmental datasets.
Related URL
Description: View Source Metadata

Description: Space Weather. Numerous space environmental datasets are available at the NGDC/STP website
Multimedia Sample
Small multimedia sample image
View full image

Description:  Diagram showing effect of a sudden ionospheric disturbance (SID) on the usable frequency window which is the unshaded region between the lowest usable frequency (LUF) and the maximum usable frequency (MUF). Normally, both the MUF and LUF increase when the sun rises, thereby keeping a band between them open for HF communications. But during a strong SID, the LUF will increase to a frequency higher than the MUF, thus closing the usable frequency window, an event called a short wave fadeout. Note the rapid onset of the SID that is typical of these disturbances.

 
Geographic Coverage
Spatial coordinates   
  N: 90.0   S: -90.0   E: 180.0   W: -180.0

Data Set Citation
Dataset Originator/Creator: Scientific Data Stewardship provided by the National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce.
Dataset Title: Solar Features - Solar Flares - SIDS
Dataset Release Date: 2011-10-01
Temporal Coverage
Start Date: 1818-01-01
Stop Date: 2009-12-30
Platform
start here with 1 in span in link Ancillary Description
Instrument
IONOSONDE Ancillary Description
Use Constraints Access Constraints: None Use Constraints: None Distribution
Liability: While every effort has been made to ensure that these data are
accurate and reliable within the limits of the current state of the art, NOAA
cannot assume liability for any damages caused by any errors or omissions in
the data, nor as a result of the failure of the data to function on a
particular system. NOAA makes no warranty, expressed or implied, nor does the
fact of distribution constitute such a warranty.
Data Set Progress
IN WORK
Data Center
National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce Supplemental Info
Data Center URL: https://ncei.noaa.gov/

Data Center Personnel
Name: WILLIAM DENIG
Phone: (303) 497-6323
Fax: (303) 497-6513
Email: solar.ngdc at noaa.gov
Contact Address:
325 Broadway E/GC2
City: Boulder
Province or State: CO
Postal Code: 80305
Country: USA
View entire list
Distribution
Distribution Format: pdf
Fees: Data can be downloaded free of charge.

Distribution Format: txt
Fees: Data can be downloaded free of charge.
Personnel
Role: DIF AUTHOR
Role: TECHNICAL CONTACT
Phone: (303) 497-6323
Fax: (303) 497-6513
Email: solar.ngdc at noaa.gov
Contact Address:
325 Broadway E/GC2
City: Boulder
Province or State: CO
Postal Code: 80305
Country: USA
Extended Metadata Properties
(Click to view more)

Creation and Review Dates
DIF Creation Date: 2015-11-16
Last DIF Revision Date: 2018-05-22