WMO OSCAR | Gap analyses by variable or by type of mission or by WIGOS subcomponent

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Gap analyses by variable or by type of mission or by WIGOS subcomponent

Please select either a variable or a type of mission to display a time chart of satellite instruments having the potential to provide the corresponding measurements. The selection is based on design characteristics (Expert analysis) or declared mission objectives (Simplified analysis). Such a preliminary analysis does not replace a detailed assessment of the actual instrument performances, data availability, and quality of derived environmental data records against specific user requirements.

Note: The chart can be sorted by clicking on the header columns and filtered by instrument properties when applicable. Select the period of interest with the cursor at the bottom of the chart. Future missions which are not firmly planned are shaded with stripes. A warning icon () indicates degraded satellite: hover over the icon for details. The chart is followed by a table of all potentially relevant instruments.

Select a variable

or select a type of mission

Select WIGOS subcomponents

Subcomponent 1

Subcomponent 2

Subcomponent 3

Subcomponent 4

Instrument types

ECT range

Orbit types

Longitude range

Analysis

Expert system, based on instrument properties Help icon

Simplified, based on mission objectives Help icon

In "Simplified" mode, the results in the analysis are calculated by looking at each instrument's mission objectives: for each instrument we keep track of what the primary, secondary, and opportunity mission objectives are. These mission objectives indicate that an instrument is primarily envisioned to measure variable X, Y and Z, that variables A, B and C are its secondary objective, and that it may offer the opportunity to measure variables I and II although it is not optimized for that. The simplified Gap analysis produces a timeline based on this information. The simplified Gap analysis is only available for analyzing variables, not for missions.

In "Expert system" mode, the results in the analysis are calculated with an expert system. Internally, OSCAR works with a large set of 1700 rules that determine whether or not an instrument is capable of measuring a given variable, and to what degree. When you select "Expert system", the Gap analysis is performed based on this large set of rules.

Variable sorting criteria

	Each instrument is assigned with a 5-step rating, evaluated as a blend of several elements. For this particular Variable, the rating is driven by: whether measuring total (TSI) and/or spectral solar irradiance; the covered spectral range. RATING CRITERIA:
1	Contextual TSI and spectral irradiance
2	TSI measured over a spectral interval from UV to FIR
3	TSI measured over a spectral interval from UV to TIR
4	TSI measured over a spectral interval from UV to NIR
5	Spectral irradiance only

Measurement timeline for Downward short-wave irradiance at TOA

Definition:

Flux density of the solar radiation at the top of the atmosphere

Hint: Move around in the timeline by scrolling up, down, left or right.

Found 35 results

This table has a large number of results.

Hide lower rated instruments

Hide inactive instruments

Instrument	Relevance	Satellite	Orbit	1975	1976	1977	1978	1979	1980	1981	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	2026	2027	2028	2029	2030	2031	2032	2033	2034	2035	2036	2037	2038	2039
TSIS	1 - primary	ISS TSIS-1	51.6 °																																											X	X	X	X	X	X	X
TSIS	1 - primary	ISS TSIS-2	51.6 °																																																	X	X	X	X
VIRGO	1 - primary	SOHO																						X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
GGAK-E/ISP-2M	2 - very high	Electro-M N1	14.5°W																																																			X	X	X	X	X	X	X	X	X	X	X
GGAK-E/ISP-2M	2 - very high	Electro-M N2	76°E																																																				X	X	X	X	X	X	X	X	X	X	X
GGAK-E/ISP-2M	2 - very high	Electro-M N3	165.8°E																																																							X	X	X	X	X	X	X	X	X	X	X
GGAK-E/ISP-2M	2 - very high	Electro-L N4	166°E																																																	X	X	X	X	X	X	X	X	X	X	X
GGAK-E/ISP-2M	2 - very high	Electro-L N5	76°E																																																	X	X	X	X	X	X	X	X	X	X	X
SIM-1	2 - very high	FY-3A	09:05 desc																																		X	X	X	X	X	X	X	X
SIM-1	2 - very high	FY-3B	14:45 asc																																				X	X	X	X	X	X	X	X	X	X	X
SIM-1	2 - very high	FY-3C	08:20 desc																																							X	X	X	X	X	X	X	X
ERB	2 - very high	Nimbus-6	12:00 desc	X	X	X	X	X	X	X	X	X
ERB	2 - very high	Nimbus-7	12:00 desc				X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
ERBE	2 - very high	ERBS	57 °										X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
ERBE (NOAA)	2 - very high	NOAA-9	14:30 asc										X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
ERBE (NOAA)	2 - very high	NOAA-10	07:30 desc												X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
SIM-2	3 - high	FY-3E	05:40 desc																																															X	X	X	X	X	X	X
SIM-2	3 - high	FY-3J	05:00 desc																																																					X	X	X	X	X	X	X	X	X
SIM-2	3 - high	FY-3H	14:00 asc																																																	X	X	X	X	X	X	X
SOVAP	3 - high	Picard	06:00 asc																																				X	X	X	X	X
TIM	3 - high	SORCE	40 °																													X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
TIM	3 - high	STPSat-3	40.5 °																																							X	X	X	X	X	X	X	X	X	X
ACRIM-I	3 - high	SMM	28.5 °						X	X	X	X	X	X	X	X	X	X
ACRIM-II	3 - high	UARS	57 °																	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
ACRIM-III	3 - high	ACRIMSat	10:50 desc																									X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
DIFOS	4 - fair	Coronas-I	82.5 °																				X
DIFOS	4 - fair	Coronas-F	82.5 °																											X	X	X	X	X
PREMOS	4 - fair	Picard	06:00 asc																																				X	X	X	X	X
SIM	5 - marginal	SORCE	40 °																													X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
SIM	5 - marginal	CSIM	97.7 °																																												X	X	X	X	X
SSIM	5 - marginal	FY-3E	05:40 desc																																															X	X	X	X	X	X	X
SSIM	5 - marginal	FY-3J	05:00 desc																																																					X	X	X	X	X	X	X	X	X
SOLSTICE	5 - marginal	SORCE	40 °																													X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
SOLSTICE	5 - marginal	UARS	57 °																	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
SUSIM	5 - marginal	UARS	57 °																	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X

All instruments for measuring Downward short-wave irradiance at TOA

Instruments	Relevance	Operational limitations
TSIS	1 - primary
VIRGO	1 - primary
GGAK-E/ISP-2M	2 - very high
SIM-1	2 - very high
ERB	2 - very high
ERBE	2 - very high
ERBE (NOAA)	2 - very high
CSAR	3 - high
SIM-2	3 - high
SOVAP	3 - high
TIM	3 - high
ACRIM-I	3 - high
ACRIM-II	3 - high
ACRIM-III	3 - high
DIFOS	4 - fair
PREMOS	4 - fair
SIM	5 - marginal
SSIM	5 - marginal
SOLSTICE	5 - marginal
SUSIM	5 - marginal