CCMC Metadata Registry (CMR)

Go to:

• About
• View Metadata
• Login

GEMSOR (1)

Global Empirical Model of Sporadic-E Occurrence Rates

Model Description

The GEMSOR provides occurrence rates (ORs) of blanketing sporadic-E with intensities of fbEs >= 3 MHz.   ORs are estimated from a combination of ionosonde & GNSS radio occultation observations, with a Karhunen–Loéve Expansion (KLE) used to improve temporal resolution.

Model Figure(s) :

Model Inputs Description

The model data is stored in two .mat files. These are read and output based on the user inputs described below.

Model Outputs Description

Outputs the occurrence rate and uncertainty for the given user inputs. Also outputs a plot of the occurrence rates and uncertainties for the 12 hours before and after the requested time for the given user inputs.

Model Caveats

There are many locations (generally high and low latitudes) and times that did not have sufficient data to generate an estimated occurrence rate with high confidence. These will be indicated by a zero or near zero occurrence rate with a zero or unreported uncertainty. 

The model also assumes geomagnetic quiet conditions. These were defined as an AE index < 500nT and a Kp <= 4.

The model uses the 2020 World Magnetic Model to convert user input geographic latitudes into geomagnetic latitudes using the magnetic inclination (dip) as the geomagnetic latitude. User inputs outside the years 2010-2030 are likely to be much less reliable. 

Change Log

Model Acknowledgement/Publication Policy (if any)

Model Domains:

Space Weather Impacts:

Phenomena :

Simulation Type(s):

Temporal Dependence Possible? (whether the code results depend on physical time?)

Model is available at?

Source code of the model is publicly available?

CCMC Model Status (e.g. onboarding, use in production, retired, only hosting output, only source is available):

Code Language:

Regions (this is automatically mapped based on model domain):

Contacts :

Acknowledgement/Institution :

Relevant Links :

Publications :

Model Access Information :

Linked to Other Spase Resource(s) (example: another SimulationModel) :

Curator: Chiu Wiegand | NASA Official: Dr. Masha Kuznetsova | Privacy and Security Notices | Accessibility | CCMC Data Collection Consent Agreement