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 (Important note) 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
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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 Significant wave height

Definition: Average amplitude of the highest 30 of 100 waves.

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

Found 89 results

Instrument NRT? Relevance Satellite Orbit
1976
1977
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KaRIN1 - primarySWOT78 °XXXX
SWIM1 - primaryCFOSAT07:00 desc
X
XXXX
SWIM1 - primaryCFOSAT follow-on07:00 descXXXXXX
SHIOSAI1 - primaryCOMPIRA51 °XXXXXX
AltiKa2 - very highSARAL06:00 asc
X
XXXXX
ALT (HY-2A)2 - very highHY-2A06:00 desc
X
XXXXXXX
ALT (HY-2A)2 - very highHY-2B06:00 desc
X
XXXXX
ALT (HY-2A)2 - very highHY-2C66 °XXXXXX
ALT (HY-2A)2 - very highHY-2D66 °XXXXXX
ALT (HY-2A)2 - very highHY-2E06:00 descXXXXXX
ALT (HY-2A)2 - very highHY-2F66 °XXXXXX
ALT (HY-2A)2 - very highHY-2G66 °XXXXXX
ALT (SeaSat)2 - very highSeaSat108 °
X
Altimeter2 - very highSWOT78 °XXXX
Altimeter (COMPIRA)2 - very highCOMPIRA51 °XXXXXX
GFO-RA2 - very highGFO108 °
X
XXXXXXXXX
X
GRA2 - very highGEOSat108 °
X
XXXX
X
NRA2 - very highTOPEX-Poseidon66 °
X
XXXXXXXXXXXX
X
Poseidon-22 - very highJASON-166 °
X
XXXXXXXXXXX
X
Poseidon-3Yes2 - very highJASON-266 °
X
XXXXXXXXXX
Poseidon-3BYes2 - very highJASON-366 °
X
XXXXX
RA2 - very highERS-110:30 desc
X
XXXXXXXX
X
RA2 - very highERS-210:30 desc
X
XXXXXXXXXXXXXXX
X
RA-22 - very highEnvisat10:00 desc
X
XXXXXXXXX
X
SIRAL2 - very highCryoSat92 °
X
SIRALNo2 - very highCryoSat-292 °
X
XXXXXXXX
SRALYes2 - very highSentinel-3A10:00 desc
X
XXXXXXX
SRALYes2 - very highSentinel-3B10:00 desc
X
XXXXXXX
SRAL2 - very highSentinel-3C10:00 descXXXXXXXX
SRAL2 - very highSentinel-3D10:00 descXXXXXXXX
SRAL (JASON)2 - very highJASON-CS-A66 °XXXXXXXX
SRAL (JASON)2 - very highJASON-CS-B66 °XXXXXXXX
SSALT2 - very highTOPEX-Poseidon66 °
X
XXXXXXXXXXXX
X
BRLK “Briz”3 - highMeteor-MP N115:30 ascXXXXXXXX
BRLK “Briz”3 - highMeteor-MP N209:30 descXXXXXXXX
BRLK “Briz”3 - highObzor-R N1TBDXXXXXX
BRLK “Briz”3 - highObzor-R N2TBDXXXXXX
BRLK “Briz”3 - highObzor-R N3TBDXXXXXX
BRLK “Briz”3 - highObzor-R N4TBDXXXX
COSI3 - highKOMPSAT-506:00 asc
X
XXXXX
HRWS-SAR3 - highHRWS-SAR06:00 descXXXXXXX
MeteoSAR3 - highMeteor-M N312:00 ascXXXXXX
MeteoSAR3 - highMeteor-M N2-315:09 ascXXXXXX
MeteoSAR3 - highMeteor-M N2-409:00 descXXXXXX
MeteoSAR3 - highMeteor-M N2-515:00 descXXXXXX
MeteoSAR3 - high Meteor-M N2-609:00 ascXXXXXX
SAR-2000No3 - highCSK-1 Important note06:00 asc
X
XXXXXXXXXXX
SAR-2000No3 - highCSK-2 Important note06:00 asc
X
XXXXXXXXXXX
SAR-2000No3 - highCSK-3 Important note06:00 asc
X
XXXXXXXXXX
SAR-2000No3 - highCSK-4 Important note06:00 asc
X
XXXXXXXX
SAR-2000 S.G.3 - highCSG-106:00 asc
X
XXXXXXX
SAR-2000 S.G.3 - highCSG-206:00 ascXXXXXXXX
SAR-X3 - highTanDEM-X06:00 desc
X
XXXXXXXX
SAR-X3 - highTerraSAR-X06:00 desc
X
XXXXXXXXXXX
SAR-X3 - highTSX-NG06:00 descXXXXXXXX
SAR-X (Paz (SEOSAR))3 - highSEOSAR/Paz06:00 asc
X
XXXXX
SAR-X (RISAT-2) Important note3 - highRISAT-241 °
X
XXXXXXXXX
W-SAR3 - highHY-3A06:00 descXXXXXXXXX
W-SAR3 - highHY-3B06:00 descXXXXXXXXX
AMI-SAR4 - fairERS-110:30 desc
X
XXXXXXXX
X
AMI-SAR4 - fairERS-210:30 desc
X
XXXXXXXXXXXXXXX
X
ASAR4 - fairEnvisat10:00 desc
X
XXXXXXXXX
X
SAR (RadarSat-1)4 - fairRadarSat-106:00 desc
X
XXXXXXXXXXXXXXXXX
X
SAR (RadarSat-1)No4 - fairRadarSat-206:00 desc
X
XXXXXXXXXXX
SAR RCM4 - fairRCM-106:00 desc
X
XXXXXXX
SAR RCM4 - fairRCM-206:00 desc
X
XXXXXXX
SAR RCM4 - fairRCM-306:00 desc
X
XXXXXXX
SAR-C (GF-3)4 - fairGF-306:00 desc
X
XXXXXXXX
SAR-C (RISAT)4 - fairRISAT-106:00 desc
X
XXXX
X
SAR-C (RISAT)4 - fairRISAT-1A06:00 descXXXXX
SAR-C (Sentinel-1)No4 - fairSentinel-1A06:00 desc
X
XXXXXXX
SAR-C (Sentinel-1)4 - fairSentinel-1B06:00 desc
X
XXXXXXX
SAR-C (Sentinel-1)No4 - fairSentinel-1C06:00 descXXXXXXXX
SAR-C (Sentinel-1)No4 - fairSentinel-1D06:00 descXXXXXXXX
SAR-Travers5 - marginalResurs-O1-110:15 asc
X
X
SAR-10 Important note5 - marginalKondor-E174.75 °
X
XXXXX
SAR-105 - marginalKondor-E74.75 °
X
X
SAR-S Important note5 - marginalHJ-1C Important note06:00 desc
X
XXXXXX
SAR-S (NISAR) 5 - marginalNI-SAR06:00 descXXXXXX
PALSAR5 - marginalALOS10:30 desc
X
XXXX
X
PALSAR-2No5 - marginalALOS-212:00 desc
X
XXXXXX
PALSAR-35 - marginalALOS-412:00 descXXXXXXXX
SAR5 - marginalSeaSat108 °
X
SAR (JERS)5 - marginalJERS10:45 desc
X
XXXXX
X
SAR-L5 - marginalSAOCOM-1A06:00 asc
X
XXXXX
SAR-L5 - marginalSAOCOM-1B06:00 asc
X
XXXXX
SAR-L5 - marginalSAOCOM-2A06:00 ascXXXXXX
SAR-L5 - marginalSAOCOM-2B06:00 ascXXXXXX
SAR-L (NISAR)5 - marginalNI-SAR06:00 descXXXXXX
All instruments for measuring Significant wave height
Instruments Relevance Operational limitations
KaRIN1 - primaryInfrequent coverage..
SWIM1 - primaryInfrequent coverage..
SHIOSAI1 - primaryInfrequent coverage..
AltiKa2 - very highAlong-track only..
ALT (HY-2A)2 - very highAlong-track only..
ALT (SeaSat)2 - very highAlong-track only..
Altimeter2 - very highAlong-track only..
Altimeter (COMPIRA)2 - very highAlong-track only..
GFO-RA2 - very highAlong-track only..
GRA2 - very highAlong-track only..
NRA2 - very highAlong-track only..
Poseidon-22 - very highAlong-track only..
Poseidon-32 - very highAlong-track only..
Poseidon-3B2 - very highAlong-track only..
RA2 - very highAlong-track only..
RA-22 - very highAlong-track only..
SIRAL2 - very highAlong-track only..
SRAL2 - very highAlong-track only..
SRAL (JASON)2 - very highAlong-track only..
SSALT2 - very highAlong-track only..
SAR-X/Ku3 - highHighly indirect.. Infrequent coverage..
BRLK “Briz”3 - highHighly indirect.. Infrequent coverage..
COSI3 - highHighly indirect.. Infrequent coverage..
HRWS-SAR3 - highHighly indirect.. Infrequent coverage..
MeteoSAR3 - highHighly indirect.. Infrequent coverage..
SAR-20003 - highHighly indirect.. Infrequent coverage..
SAR-2000 S.G.3 - highHighly indirect.. Infrequent coverage..
SAR-X3 - highHighly indirect.. Infrequent coverage..
SAR-X (Paz (SEOSAR))3 - highHighly indirect.. Infrequent coverage..
SAR-X (RISAT-2)3 - highHighly indirect.. Infrequent coverage..
W-SAR3 - highHighly indirect.. Infrequent coverage..
AMI-SAR4 - fairHighly indirect.. Infrequent coverage..
ASAR4 - fairHighly indirect.. Infrequent coverage..
SAR (RadarSat-1)4 - fairHighly indirect.. Infrequent coverage..
SAR RCM4 - fairHighly indirect.. Infrequent coverage..
SAR-C (GF-3)4 - fairHighly indirect.. Infrequent coverage..
SAR-C (RISAT)4 - fairHighly indirect.. Infrequent coverage..
SAR-C (Sentinel-1)4 - fairHighly indirect.. Infrequent coverage..
SAR-Travers5 - marginalHighly indirect.. Infrequent coverage..
SAR-105 - marginalHighly indirect.. Infrequent coverage..
SAR-S5 - marginalHighly indirect.. Infrequent coverage..
SAR-S (NISAR) 5 - marginalHighly indirect.. Infrequent coverage..
SAR-S (NovaSAR)5 - marginalHighly indirect.. Infrequent coverage..
InSAR5 - marginalHighly indirect.. Infrequent coverage..
PALSAR5 - marginalHighly indirect.. Infrequent coverage..
PALSAR-25 - marginalHighly indirect.. Infrequent coverage..
PALSAR-35 - marginalHighly indirect.. Infrequent coverage..
SAR5 - marginalHighly indirect.. Infrequent coverage..
SAR (JERS)5 - marginalHighly indirect.. Infrequent coverage..
SAR-L5 - marginalHighly indirect.. Infrequent coverage..
SAR-L (NISAR)5 - marginalHighly indirect.. Infrequent coverage..