Title: Anomalous Electron Temperature 

Name and contact information of PI: 
a. Name: Bela Fejer
b. Institution: Utah State University
c. Address: 4415 Old Main Hill, Logan, UT 84322
d. Email: bela.fejer@usu.edu
e. ORCiD ID: 0000-0001-9411-0152

Funding source: The work at Utah State University was supported by the NASA H-LWS program through grant 80NSSC17K071. 

Project description: Anomalous Electron Temperatures in the evening equatorial ionosphere.
We use novel radar observations at the Jicamarca Radio Observatory to study the first observations of highly enhanced plasma temperatures in the evening equatorial ionosphere. These short-lived solstice evening events occurred following large upward plasma drifts and sharply reduced plasma densities. The electron temperatures increase during the 5-6 August 2011 moderate solar event reached peak values of about 1000 K near 350 km. Smaller electron temperature increases were observed to altitudes up to about 500 km. There were also smaller concurrent ion temperature enhancements. During the very low solar flux 20-21 January 2020 event, a peak electron temperature increase of about 700K occurred at an altitude of about 270 km. We also show that SAMI2-PE simulations using the measured vertical plasma drifts reproduce the main characteristics of the measured plasma densities and temperatures up to 300 km, but not at higher altitudes.  These simulations indicate that the evening anomalous plasma heating below about 300 km is due to the decrease in the electron-ion cooling rate resulting from upward plasma drift driven decrease in the plasma density. Plasma transport and reduced cooling rate is a potential source of higher altitude heating.

Brief description of collection and processing of data:
These are outputs of simulations from the semi-empirical SAMI2-PE (Varney et al. 2012) for the night of the 02 and 05 August 2011.

Description of files (names, or if too numerous, number of files, file type(s):
4 ASCII files named:
rate_02082011.txt: contains SAMI2-PE outputs of altitude versus Heating/Cooling rates for the 02 Aug 2011 at 18:05
rate_05082011.txt: contains SAMI2-PE outputs of altitude versus Heating/Cooling rates for the 05 Aug 2011 at 18:05
Ti.txt: contains SAMI2-PE outputs of altitude versus ion temperature at 18:05 LT for the 02 and 05 Aug 2011
Te.txt: contains SAMI2-PE outputs of altitude versus electron temperature at 18:05 LT for the 02 and 05 Aug 2011

Also:
Te_2D.txt: contains SAMI2-PE outputs of altitude versus electron temperature for the 02 and 05 Aug 2011 from 12 to 22 LT

Definition of acronyms, codes, and abbreviations:
SAMI2-PE: iS Another Model of the Ionosphere 2-Photo Electron transport and energy distribution.

Description or definition any other unique information that would help others use your data:
All data presented in these dataset are outputs from the SAMI2-PE and are explained in the paper "Anomalous Electron Temperature Increases in the Evening Equatorial Ionosphere", Fejer et al. 2020.

Descriptions of parameters/variables
a. Temporal (beginning and end dates of data collection)
All files are simulations outputs for the 02 and 05 Aug 2011 at 18:05, except one of them which goes from 12 to 22 LT.
b. Instruments used and units of measurements: These are simulation outputs.
c. Column headings of data files (for tabular data): Each file has a different tabular data. Each files contain a header indicating each file.
e. Symbol used for missing data: nan

Publications that cite or use this data:
Anomalous Electron Temperature Increases in the Evening Equatorial Ionosphere, Fejer B. G, Hysell D. L, Navarro L A, Journal of Geophysical Research: Space Physics (submitted)

These data are derived using a simulation program.