WMO OSCAR | Details for Instrument Severjanin-M

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Instrument: Severjanin-M

Instrument details

Acronym	Severjanin-M
Full name	X-band Synthetic Aperture Radar
Purpose	High-resolution all-weather land observation
Short description	X-band, frequency 9.623 GHz
Background	New development
Scanning Technique	Side-looking 25-48°, swath 600 km
Resolution	Two modes: 400-500 m or 700-1000 m (variable from 1 to 500 m on Meteor-M N3
Coverage / Cycle	Global coverage in 1 month (duty cycle 10-20 %)
Mass	150 kg	Power	1000 W	Data Rate	10 Mbps

Providing Agency	RosHydroMet
Instrument Maturity	Flown on operational programme
Utilization Period:	2010 to 2025
Last update:	2024-06-10

Detailed characteristics

Satellites this instrument is flying on

Note: a red tag indicates satellites no longer operational, a green tag indicates operational satellites, a blue tag indicates future satellites

Meteor-3M (RosHydroMet)
- Meteor-M N1 (see instrument status) Apr 2010 - 2012
- Meteor-M N2 (see instrument status) Oct 2014 - Dec 2022
- Meteor-M N2-1 (see instrument status) Nov 2017 - Nov 2017
- Meteor-M N2-2 (see instrument status) Oct 2019 - Jan 2025

Instrument classification

Earth observation instrument
Active and radio-occultation sensor
Imaging radar (SAR)

WIGOS Subcomponents

Subcomponent 1
SAR imagers and altimeters
SAR imager

Mission objectives

Primary mission objectives

Fraction of vegetated land
Glacier motion
Glacier topography
Land cover
Land surface topography
Soil moisture at surface
Soil type
Vegetation type

Evaluation of Measurements

The following list indicates which measurements can typically be retrieved from this category of instrument. To see a full Gap Analysis by Variable, click on the respective variable.

Note: table can be sorted by clicking on the column headers
Note: * Primary mission objective.

Variable	Relevance for measuring this variable	Operational limitations	Explanation
Fire fractional cover	3 - high	Infrequent coverage.	X-band SAR. High resolution, for fire boundary detection
Fraction of vegetated land*	3 - high	No specific limitation.	X-band SAR
Glacier cover	2 - very high	Long time for mapping.	X-band SAR for accurate boundary detection
Glacier motion*	5 - marginal	Infrequent coverage.	X-band SAR for interferometry between images taken at time intervals
Glacier topography*	3 - high	Long time for mapping.	X-band SAR for interferometry between images taken at time intervals
Ice sheet topography	3 - high	Long time for mapping.	X-band SAR for interferometry between images taken at time intervals
Land cover*	3 - high	No specific limitation.	X-band SAR
Land surface topography*	3 - high	Long time for mapping.	X-band SAR for interferometry between images taken at time intervals
Oil spill cover	1 - primary	Infrequent coverage.	X-band SAR
Sea-ice cover	1 - primary	No specific limitation.	X-band SAR
Sea-ice elevation	4 - fair	No specific limitation.	X-band SAR. Sea ice elevation measured by interferometry
Sea-ice thickness	4 - fair	Change detection only.	X-band SAR. Sea ice elevation measured by interferometry. Thickness inferred by ice model
Sea-ice type	2 - very high	No specific limitation.	X-band SAR. Type interpreted as age/roughness
Snow cover	3 - high	Thick snow only.. Infrequent coverage.	X-band SAR
Snow status (wet/dry)	4 - fair	Thick snow only.. Infrequent coverage.	X-band SAR
Snow water equivalent	3 - high	Change detection only.. Infrequent coverage.	X-band SAR. SWE is retrieved by grigging with data from ground networks
Soil moisture at surface*	3 - high	Strongly affected by vegetation.. Infrequent coverage.	X-band SAR
Soil type*	3 - high	No specific limitation.	X-band SAR
Vegetation type*	5 - marginal	No specific limitation.	X-band SAR