WMO OSCAR | Gap analyses by variable

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Gap analyses by variable or by type of mission

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

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.

Measurement timeline for Ionospheric Vertical Total Electron Content (VTEC)

Definition:

Number of electrons between two points.

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

Found 64 results

Instrument	NRT?	Relevance	Satellite	Orbit	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	2040	2041	2042	2043	2044	2045
CERTO		1 - primary	C/NOFS	13 °																	X	X	X	X	X	X	X	X
CERTO/TBB	No	1 - primary	COSMIC-1	72 °															X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
CITRIS		1 - primary	STPSat-1	37.4 °																X	X	X
LAERTES		1 - primary	Ionosphere N1 & N2	TBD																														X	X	X	X
LAERTES		1 - primary	Ionosphere N3 & N4	TBD																															X	X	X	X
MAYAK		1 - primary	Ionosphere N1 & N2	TBD																														X	X	X	X
MAYAK		1 - primary	Ionosphere N3 & N4	TBD																															X	X	X	X
RFB		1 - primary	COSMIC-2	24 °																												X	X	X	X	X	X	X	X
RPI		1 - primary	IMAGE	90 °									X	X	X	X	X	X
WHISPER		1 - primary	CLUSTER A&B	90 °									X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
WHISPER		1 - primary	CLUSTER C&D	90 °									X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
CER		1 - primary	CASSIOPE	80 °																						X	X	X	X	X	X	X	X	X	X	X	X
CION		2 - very high	CICERO																											X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
STRATOS		2 - very high	Lemur-2																									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
IGOR (COSMIC)	No	2 - very high	COSMIC-1	72 °															X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
TGRS (COSMIC-2)		2 - very high	COSMIC-2	24 °																												X	X	X	X	X	X	X	X
ARMA-MP		3 - high	Meteor-MP N1	15:30 asc																																		X	X	X	X	X	X	X	X
ARMA-MP		3 - high	Meteor-MP N2	09:30 desc																																			X	X	X	X	X	X	X	X
Tri-G (JASON-CS)		3 - high	JASON-CS-A	66 °																													X	X	X	X	X	X	X	X
Tri-G (JASON-CS)		3 - high	JASON-CS-B	66 °																																		X	X	X	X	X	X	X	X
AOPOD		3 - high	KOMPSAT-5	06:00 asc																						X	X	X	X	X	X	X	X
GNOS	Yes	3 - high	FY-3C	09:07 desc																						X	X	X	X	X	X	X	X
GNOS	Yes	3 - high	FY-3D	13:29 asc																										X	X	X	X	X	X
GNOS-2		3 - high	FY-3G	50 °																																X	X	X	X	X	X
GNOS-2		3 - high	FY-3J	50 °																																		X	X	X	X	X	X
GNOS-2		3 - high	FY-3E	05:30 desc																														X	X	X	X	X	X
GNOS-2		3 - high	FY-3H	14:00 asc																																	X	X	X	X	X	X
GNOS-2		3 - high	FY-3F	10:00 desc																																X	X	X	X	X	X
GNOS-2		3 - high	FY-3I	05:30 desc																																		X	X	X	X	X	X
RO		3 - high	Metop-SG-A1	09:30 desc																																X	X	X	X	X	X	X	X
RO		3 - high	Metop-SG-A2	09:30 desc																																							X	X	X	X	X	X	X	X
RO		3 - high	Metop-SG-A3	09:30 desc																																														X	X	X	X	X	X	X	X
RO		3 - high	Metop-SG-B1	09:30 desc																																	X	X	X	X	X	X	X	X
RO		3 - high	Metop-SG-B2	09:30 desc																																								X	X	X	X	X	X	X	X
RO		3 - high	Metop-SG-B3	09:30 desc																																															X	X	X	X	X	X	X	X
GOLPE		3 - high	SAC-C	10:20 desc									X	X	X	X	X	X	X	X	X	X	X	X	X	X
IGOR (TacSat-2)		3 - high	TacSat-2	40 °															X	X
ROSA		3 - high	SAC-D	06:00 desc																				X	X	X	X	X
ROSA		3 - high	Megha-Tropiques	20 °																				X	X	X	X	X	X	X	X	X
GPS/MET		3 - high	OrbView-1/MicroLab	70 °				X	X	X
ROSA (OceanSat)	No	3 - high	OceanSat-2	11:53 desc																		X	X	X	X	X	X	X	X	X	X	X	X
TRSR (Ørsted)	No	3 - high	Ørsted	96.5 °								X	X	X	X	X	X	X	X
ALT (HY-2A)		4 - fair	HY-2B	06:00 desc																											X	X	X	X	X	X
ALT (HY-2A)		4 - fair	HY-2C	66 °																													X	X	X	X	X	X
ALT (HY-2A)		4 - fair	HY-2D	66 °																														X	X	X	X	X	X
ALT (HY-2A)		4 - fair	HY-2E	06:00 desc																																X	X	X	X	X	X
ALT (HY-2A)		4 - fair	HY-2F	66 °																															X	X	X	X	X	X
ALT (HY-2A)		4 - fair	HY-2G	66 °																																		X	X	X	X	X	X
ALT (HY-2A)		4 - fair	HY-2A	06:00 desc																				X	X	X	X	X	X	X	X	X	X
Altimeter		4 - fair	SWOT	78 °																														X	X	X	X
Altimeter (COMPIRA)		4 - fair	COMPIRA	51 °																													X	X	X	X	X	X
NRA		4 - fair	TOPEX-Poseidon	66 °	X	X	X	X	X	X	X	X	X	X	X	X	X	X
Poseidon-2		4 - fair	JASON-1	66 °										X	X	X	X	X	X	X	X	X	X	X	X	X
Poseidon-3		4 - fair	JASON-2	66 °																	X	X	X	X	X	X	X	X	X	X	X	X
Poseidon-3B	Yes	4 - fair	JASON-3	66 °																									X	X	X	X	X	X
RA-2		4 - fair	Envisat	10:00 desc											X	X	X	X	X	X	X	X	X	X	X
SRAL	Yes	4 - fair	Sentinel-3B	10:00 desc																											X	X	X	X	X	X	X	X
SRAL		4 - fair	Sentinel-3C	10:00 desc																																X	X	X	X	X	X	X	X
SRAL		4 - fair	Sentinel-3D	10:00 desc																																		X	X	X	X	X	X	X	X
SRAL	Yes	4 - fair	Sentinel-3A	10:00 desc																									X	X	X	X	X	X	X	X
SRAL (JASON)		4 - fair	JASON-CS-A	66 °																													X	X	X	X	X	X	X	X
SRAL (JASON)		4 - fair	JASON-CS-B	66 °																																		X	X	X	X	X	X	X	X
CORISS		4 - fair	C/NOFS	13 °																	X	X	X	X	X	X	X	X
TPMU		5 - marginal	PROBA-2	06:00 asc																		X	X	X	X	X	X	X	X	X	X	X	X

All instruments for measuring Ionospheric Vertical Total Electron Content (VTEC)

Instruments	Relevance	Operational limitations
CERTO	1 - primary	No specific limitation..
CERTO/TBB	1 - primary	No specific limitation..
CITRIS	1 - primary	No specific limitation..
LAERTES	1 - primary	No specific limitation..
MAYAK	1 - primary	No specific limitation..
RFB	1 - primary	No specific limitation..
RPI	1 - primary	No specific limitation..
WHISPER	1 - primary	No specific limitation..
CER	1 - primary	No specific limitation..
CION	2 - very high	No specific limitation..
STRATOS	2 - very high	No specific limitation..
IGOR (COSMIC)	2 - very high	No specific limitation..
TGRS (COSMIC-2)	2 - very high	No specific limitation..
ARMA-MP	3 - high	No specific limitation..
Tri-G (JASON-CS)	3 - high	No specific limitation..
AOPOD	3 - high	No specific limitation..
GNOS	3 - high	No specific limitation..
GNOS-2	3 - high	No specific limitation..
GNSS-RO	3 - high	No specific limitation..
Radiomet	3 - high	No specific limitation..
RO	3 - high	No specific limitation..
GOLPE	3 - high	No specific limitation..
IGOR (TacSat-2)	3 - high	No specific limitation..
ROSA	3 - high	No specific limitation..
GPS/MET	3 - high	No specific limitation..
ROSA (OceanSat)	3 - high	No specific limitation..
TRSR (Ørsted)	3 - high	No specific limitation..
ALT (HY-2A)	4 - fair	Along-track only..
Altimeter	4 - fair	Along-track only..
Altimeter (COMPIRA)	4 - fair	Along-track only..
NRA	4 - fair	Along-track only..
Poseidon-2	4 - fair	Along-track only..
Poseidon-3	4 - fair	Along-track only..
Poseidon-3B	4 - fair	Along-track only..
RA-2	4 - fair	Along-track only..
SRAL	4 - fair	Along-track only..
SRAL (JASON)	4 - fair	Along-track only..
CORISS	4 - fair	No specific limitation..
TPMU	5 - marginal	No specific limitation..