SRON Netherlands Institute for Space Research
Dutch national institute for space research, affiliated with the Netherlands Organisation for Scientific Research (NWO). Develops scientific instruments for ESA and NASA missions, with particular strength in optical design, detector technology, cryogenic instrumentation, and space qualification. SRON is the principal investigator institute for Sentinel-5 Precursor TROPOMI and the upcoming Sentinel-5 UVNS spectrometers, and contributes to a range of Earth observation, astrophysics, and exoplanet missions including Athena, METIS for ELT, and ARIEL.
SRON Netherlands Institute for Space Research is the Dutch national institute for space research and an institutional member of NWO-I, the institute organisation of the Netherlands Organisation for Scientific Research (NWO).[^sron-about] Operating from facilities in Leiden and Groningen, SRON conducts research and develops scientific instruments across two primary domains: Earth observation and astrophysics.
In Earth observation, SRON is best known as co-developer and co-Principal Investigator (co-PI) of the Tropomi (TROPOspheric Monitoring Instrument) aboard ESA's Sentinel-5 Precursor satellite, launched 2017.[^eoportal-s5p] Within the Tropomi consortium (Airbus Netherlands as prime contractor, TNO as lead optical designer, KNMI as overall scientific PI), SRON contributed the immersed diffraction grating for the short-wavelength infrared (SWIR) spectrometer channel and the readout electronics for the SWIR methane detector.[^sron-sentinel5-mission] The immersed grating, lines etched into a silicon wafer set inside a prism, enables denser wavelength dispersion than air-gap gratings, reducing the SWIR channel's physical volume while improving spectral separation. SRON holds scientific leadership of the SWIR channel, covering the CH4, CO, and H2O data products derived from it.[^sron-sentinel5-mission]
SRON extended the same immersed grating technology to the Sentinel-5 UVNS instrument aboard MetOp-SG A, launched 2025.[^sron-metop-sg] The instrument covers 270-2385 nm across UV, visible, NIR, and SWIR channels; SRON's contribution again targets the SWIR grating component.
For NASA's PACE mission, launched 2024, SRON co-developed SPEXone, an aerosol polarimeter observing in five viewing directions across 385-770 nm.[^sron-spexone] SPEXone measures polarised sunlight to characterise atmospheric aerosol distributions and their role in cloud formation, narrowing uncertainty in climate models for aerosol cooling effects.
SRON's technology capabilities include cryogenic detector systems to 0.1 Kelvin, precision immersed grating fabrication, multi-angle polarimetric telescope design, nanotechnology cleanrooms, and space qualification of electronic and mechanical subsystems.