Sentinel-3B
type: Platform
type: Concept
narrower: MWR
hosts: MWR

in platform

Instrument
type: ConceptGroup
type: Collection
member: MWR

Sentinel-3A
type: Platform
type: Concept
narrower: MWR
hosts: MWR

MWR
in platform: Sentinel-3B
in platform: Sentinel-3A
source: mwr
definition: The design and specifications of the SENTINEL-3 MWR have been based on those of the Envisat MWR. The instrument will measure brightness temperature at 23.8 GHz and 36.5 GHz covering a bandwidth of 200 MHz in each channel. The lower frequency channel is mostly sensitive to atmospheric water vapour and the higher frequency channel to cloud liquid water. Conceptually, it is a balanced Dicke radiometer for brightness temperatures below the Dicke load temperature. Balancing is achieved by means of a noise injection circuit. For brightness temperatures higher than the Dicke load temperature, a conventional Dicke mode is used. The radiometer employs a single offset reflector of 60 cm diameter and two separate feeds for the two channels. Calibration is achieved through a dedicated horn antenna pointing at the cold sky and the highly stable and precisely monitored internal Dicke load.
alternative label: Micro-Wave Radiometer
type: Concept
type: Sensor