Airborne / L- and C-band microwave radiometers + infrared radiometer

Examples of potential applications Mapping of sea surface salinity and its variability (estuaries and coastal waters).	Range of flight height and captured zone width (m) Typical altitudes: 2600 m, 700–1100-m-wide beam footprints spanning a 5-km swath.
	Spectral Range (nm) 8000–14,000-nm and 9600–11,500-nm.
	Spatial Resolution (m) 1-km resolution.
Benefits Clouds do not block the microwave observations, but they do cause gaps in the IR observations, which are filled by interpolation.	Limitations In-situ data are usually collected to complement surveys that use airborne salinity sensors.
Selection of references Klemas V. 2011. Remote Sensing of Sea Surface Salinity: An Overview with Case Studies. Journal of Coastal Research. 27:830. doi:10.2112/JCOASTRES-D-11-00060.1. https://doi.org/10.2112/JCOASTRES-D-11-00060.1