January 2, 2017

e-POP Data

e-POP data can be accessed two ways:

  • eDEx
    e-POP Data Explorer application. Find and download data by date, instrument, instrument mode, spacecraft position, geophysical parameter, etc. Java application download required. The most powerful and efficient way to find and download e-POP data in most cases.
  • epop-data.phys.ucalgary.ca
    HTTP access via a date-driven folder tree. Allows for quick look and summary file browsing. No login required.

e-POP Data User’s Guide

Download the e-POP Data User’s Guide for descriptions of the e-POP raw and level 1+ data sets, including data formats, quality indicators, algorithms used for generation of level 1+ products, and a guide for use of the e-POP data.

e-POP Data Changes

See the release notes for each change in the e-POP data set.

Publication Data

For publication-quality data products please contact the relevant instrument PI. Contact information can be found on the contact page.

e-POP Data Explorer (eDEx)

eDEx is a desktop application designed to help find e-POP data and related products. Find and filter data by date, instrument type, instrument mode, spacecraft position, geophysical parameter, etc. Complex custom searches are supported!

Download eDEx

eDEx Requirements

  • Java Desktop Runtime Environment Version 8 or above
  • Port 21 (FTP) open to epop-data.phys.ucalgary.ca
  • Port 3306 (SQL) open to epop-data.phys.ucalgary.ca
  • For Mac users: launch application from the terminal with the following syntax:
    java -XstartOnFirstThread -jar eDEx_v1_2_4_macosx.jar

eDEx Documents

e-POP Data Visualization Tools

Below are links to executable IDL save files to visualize level 0 data products (and in the case of FAI and RRI level 1 as well). An installation of IDL 8.2 or greater is required (no license is required for most functions), and can be obtained by contacting Harris Geospacial Solutions. Some tools require the IDL Geopack DLM from Haje Korth to be installed.

FAI: faitools_v2.4.zip
IRM: irmtools_v10.zip
MGF: mgftools_v3.2.zip
RRI: read_rri_lv1_v1.4.zip
SEI: seitools_v1.0.zip

e-POP Data Changes and Updates

April 23, 2018
e-POP payload quicklook version 1.5 released. Fixed bug that caused some apogee markers to not be shown. Updated plot logos.
CER_TEC plots updated to version 1.2. Added plot creation time. Updated plot logos.
CERQL v 1.1 released. Added plot creation time. Updated plot logos.
FAI summary version 1.2 released. Added plot creation time. Updated plot logos.
FAIQL v2.4e released. Updated plot logos.
GAP lv1 version 2-0 released. Files better represent GAP on/off session times, there are now no large time gaps in the data.
GAPQL version 1.3 released. Added better filtering of bad data points. Added plot creation time. Updated plot logos.
IRMQL 3.42e released. Updated plot logos.
RRIQL v2.3 released. Added plot creation time. Updated plot logos.

April 20, 2018
Removed low resolution ephemeris files.
Use CAS_ephemeris_hires_*.txt files instead.

February 16, 2018
Released v2.2 of the RRI quicklook product. Fixed a bug that incorrectly reported the times for high dwell sweeps. Fixed an issue with y-axis ticks incorrectly overlapping on sweep plots. Inner x-axis ticks for input B sweep plots are now the correct length.

February 1, 2018
RRI quicklook updated to read version 5 of the RRI h5 files. Added visual x-axis tick marks.

January 29, 2018
RRI level 1 h5 product updated to version 5 to fix a bug that caused the last sweep of a swept-frequency session to be discarded.

January 11, 2018
MGF level 1, 2, and 3 products updated to version 1.0.1. The time is now correct for events when the S/C mission elapsed time was offset from UTC. Now using higher time resolution S/C attitude data for transformation to GEI coordinates.

December 29, 2017
FAI quicklook product updated to have 0.5% of pixels above the color scale maximum. Now at version 2.4.

October 10, 2017
The format of the CASSIOPE ephemeris data files has changed for version 9.0+ of the product. Latitude, longitude, magnetic latitude, and magnetic longitude are now given to three decimal places rather than one.

An error in the ephemeris data calculations has been corrected for all dates in 2017. A one-second shift in the GPS time led to errors of ~7.5 km in the position estimate. The correction is applied in version 9.0+ of the CAS_ephemeris_*.txt data products.

The RRI level 1 product has been updated to version 4 to utilize the improved precision of the ephemeris data.

April 22, 2017
e-POP data for January 1 to April 22, 2017, downloaded between January 1 to April 22, 2017, have a timing error of one second. The UTC leap second inserted on December 31, 2016 was not accounted for on the spacecraft, and was corrected on April 22, 2017. If you downloaded files for this time period before April 22, 2017, please re-download the corrected data.