Space environment

Also known as LEO environment, Space weather, Radiation environment, Thermosphere

What low Earth orbit does to a small satellite: a thermosphere whose density follows the Sun, atomic oxygen, trapped and solar radiation, a dipole-like magnetic field, strong thermal forcing and debris. PocketQubes feel each effect more strongly per kilogram.

Document
SQ-EN-002
Updated
20 Oct 2026
Reading time
7 min
In this tab

The environment in one table#

Low Earth orbit is benign compared with geostationary or deep-space orbits, but it is not empty. The space-environment standard lists the effects a design must cover: the neutral atmosphere, plasma, radiation, the geomagnetic field, electromagnetic radiation from Sun and Earth, and meteoroids and debris[1].

ElementWhat it does to a small satelliteWhere to look
ThermosphereDrag shortens lifetime and disturbs attitude; density varies tenfold with the SunThis entry; lifetime calculator
Atomic oxygenErodes polymers and silver; changes thermal-control surfacesMaterials
RadiationTotal dose ages electronics; single events flip bits or latch partsOBC/CDH
Geomagnetic fieldTorques magnets and coils; the reference for magnetometers and PMACPMAC, ADCS
Sunlight, albedo, Earth infraredDrive power generation and temperature swingsStructures and thermal
EclipsesBattery cycling; thermal cyclingEPS
Debris and meteoroidsImpacts; collision avoidance; regulationRegulation and debris

Why PocketQubes feel it more#

Most environmental effects enter through the surface, while the resources to resist them scale with volume. A 1P has 0.60 cm² of surface per gram against 0.33 cm²/g for a fully loaded 1U[2], so per kilogram it collects more drag, more atomic-oxygen fluence and more thermal forcing, and it has less room for shielding or insulation.

References

  1. [1]European Cooperation for Space Standardization. (2020). ECSS-E-ST-10-04C Rev.1: Space engineering — Space environment. ESA Requirements and Standards Section.ecss.nl(accessed 20 October 2026)
  2. [2]nadir lab. (2026). PocketQube picosatellites: A review of standards, mission trends and miniaturization constraints, with lessons learned from Grizu-263A, Türkiye’s first PocketQube [Preprint]. nadir lab.Read on nadir lab.
  3. [3]Kennewell, J. (1999). Satellite orbital decay calculations. IPS Radio and Space Services, Australian Space Weather Agency.sws.bom.gov.au(accessed 20 October 2026)
  4. [4]Picone, J. M., Hedin, A. E., Drob, D. P., & Aikin, A. C. (2002). NRLMSISE-00 empirical model of the atmosphere: Statistical comparisons and scientific issues. Journal of Geophysical Research: Space Physics, 107(A12), 1468.doi:10.1029/2002JA009430
  5. [5]Vallado, D. A. (2013). Fundamentals of Astrodynamics and Applications (4th ed.). Microcosm Press.
  6. [6]NOAA Space Weather Prediction Center. (2019). Solar Cycle 25 forecast update.spaceweather.gov(accessed 20 October 2026)
  7. [7]NOAA Space Weather Prediction Center. (2023). NOAA forecasts quicker, stronger peak of solar activity.spaceweather.gov(accessed 20 October 2026)
  8. [8]NOAA Space Weather Prediction Center. (n.d.). Observed monthly 10.7 cm solar radio flux.services.swpc.noaa.gov(accessed 20 October 2026)
  9. [9]Banks, B. A., Backus, J. A., & de Groh, K. K. (2008). Atomic oxygen erosion yield predictive tool for spacecraft polymers in low Earth orbit (NASA/TM-2008-215490). NASA Glenn Research Center.
  10. [10]de Groh, K. K., Banks, B. A., McCarthy, C. E., Rucker, R. N., Roberts, L. M., & Berger, L. A. (2008). MISSE 2 PEACE polymers atomic oxygen erosion experiment on the International Space Station. High Performance Polymers, 20, 388–409.
  11. [11]nadir lab. (2026). Materials engineering for PocketQube picosatellites: A scaling-based review and design guide [Preprint]. nadir lab.Read on nadir lab.
  12. [12]NASA Small Spacecraft Systems Virtual Institute. (2026). Small Spacecraft Avionics. State-of-the-Art of Small Spacecraft Technology (2026 edition), Chapter 8. NASA Ames Research Center.nasa.gov(accessed 20 October 2026)
  13. [13]Kopp, G., & Lean, J. L. (2011). A new, lower value of total solar irradiance: Evidence and climate significance. Geophysical Research Letters, 38, L01706.doi:10.1029/2010GL045777
  14. [14]Wertz, J. R., Everett, D. F., & Puschell, J. J. (Eds.). (2011). Space Mission Engineering: The New SMAD. Microcosm Press.
  15. [15]Kahr, E., Montenbruck, O., & O’Keefe, K. (2013). Estimation and analysis of two-line elements for small satellites. Journal of Spacecraft and Rockets, 50, 433–439.doi:10.2514/1.A32352

Cite this SatWiki entry

@misc{nadirlab2026space,
  author       = {{nadir lab.}},
  title        = {{Space environment}},
  year         = {2026},
  month        = oct,
  howpublished = {nadir lab. SatWiki SQ-EN-002 (Rev. 1)},
  url          = {https://nadirlab.space/en/wiki/space-environment/}
}