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Laboratory for Atmospheric and Space Physics

Data and HAM Radio


The on-orbit science data from MinXSS are available on:

  1. (now) this webpage (updated daily with the most recent data downlinked from the spacecraft)
  2. (later in 2018) our LASP Interactive Solar Irradiance Data Center (LISIRD) site
  3. (later in 2018) NASA’s CDAW database under the category “Cubesats”, where CSSWE data can also be found
  4. (later in 2018) the Virtual Solar Observatory

The data are packaged as a mission-length .sav file that can be restored in either IDL or Python. We provide some how-to instructions for loading and plotting the data here (same as link in left navigation bar). The table below briefly describes each product data level, links to a full description (same as the links in the left navigation bar), and provides a direct download link.

Our processing source code is also available as a repository on GitHub.

Data Product Level Brief Description Full Description Download
Raw telemetry Binary data downloaded directly from spacecraft link N/A
Level 0B IDL interprets the binary into anonymous structures and stores in an IDL saveset per day link N/A
Level 0C Sort the level 0b data by onboard generation date and store in daily and mission length IDL savesets and csv files link N/A but planned for release
Level 0D Co-algin discrete telemetry packets with the time of science measurements, pull in ancillary data necessary for level 1 processing, store as mission length IDL saveset link link
Level 1 Calibrated solar soft x-ray spectra and store as mission length IDL saveset link link
Level 2 Bad science data removed, long-term degradation corrected, stored as mission length IDL saveset link In development
Level 3 Calculate daily average for all packet variables including solar soft x-ray spectra, store as mission length IDL saveset link link
Level 4 Read level 1, fold estimated input X123 photon flux through XP response’s correlated count trends link In development
Level 5 Read level 1 and fit physical parameters with observed spectra link In development

Principal Investigator:
Data access:

MinXSS data processing code authors:
Thomas N. Woods (
James Paul Mason (
Christopher Moore (
Amir Caspi (


The software to decode realtime MinXSS telemetry is publicly available for Windows and Mac and is open source so that the code can be run in Python on any platform (macOS, Windows, Linux). You can get it here. It’s been in use by several HAM operators around the world, including Virginia, Japan, and the Netherlands.

The MinXSS-1 beacons occur every 54 seconds at 437.345 MHz GMSK modulation. The software can connect to either a TCP/IP socket (e.g., to a software defined radio) or a serial device (e.g., TNC via USB). The software will interpret the data encoded in the beacon, display some of the real-time housekeeping of the spacecraft (temperatures, voltages, currents, etc) and automatically forward all received beacons to the MinXSS team. That is very valuable for us since we only have a single ground station located in Boulder, CO, USA  (40.0274° N, 105.2519° W) so have no way to hear from the spacecraft when it’s not over us. That automatic forwarding can be turned off with a checkbox. We encourage other CubeSat teams to fork the source code on github and adapt it for their telemetry.

Many thanks to the worldwide radio community for the beacon packets already forwarded to us!