WMO OSCAR | Details for Instrument TANSO-FTS/2

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Instrument: TANSO-FTS/2

Instrument details

Acronym	TANSO-FTS/2
Full name	Thermal And Near infrared Sensor for carbon Observations - Fourier Transform Spectrometer / 2
Purpose	Measurements of CH4, CO2, H2O, O2, O3 and aerosol
Short description	5–band interferometer (3 in NIR/SWIR, 2 in TIR). Polarisation observation in the 3 short-wave bands [see detailed characteristics below]
Background	Evolution of TANSO-FTS. Split TIR range
Scanning Technique	Cross-track mechanical pointing, swath 790 km
Resolution	10.5 km at s.s.p.
Coverage / Cycle	Global coverage in 3 days
Mass	329 kg	Power	400 W	Data Rate	5.9 Mbps

Providing Agency	JAXA
Instrument Maturity	Flown on an R&D satellite
Utilization Period:	2019 to 2024
Last update:	2021-09-10

Detailed characteristics

Spectral range	Spectral range	Spectral resolution(unapodised)	SNR or NEΔT @ specified input
14.3-8.4 µm	699-1190 cm^-1	0.2 cm^-1	0.3 K @ 280 K
8.4-5.6 µm	1190-1790 cm^-1	0.2 cm^-1	0.3 K @ 280 K
2.38-1.92 µm	4200-5210 cm^-1	0.2 cm^-1	300 @ 30 % albedo
1.69-1.56 µm	5920-6410 cm^-1	0.2 cm^-1	300 @ 30 % albedo
0.772-0.753 µm	12950-13280 cm^-1	0.2 cm^-1	300 @ 30 % albedo

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

Greenhouse gas Observing Satellite (JAXA)
- GOSAT-2 (see instrument status) Jan 2019 - 2024

Instrument classification

Earth observation instrument
Passive optical radiometer or spectrometer
Cross-nadir infrared sounder, possibly including VIS channels

WIGOS Subcomponents

Subcomponent 1
IR hyperspectral sounders [in SSO]
IR hyperspectral sounder [in SSO]

Mission objectives

Primary mission objectives

Atmospheric temperature
CH4 mole fraction
CO2 mole fraction
H2O
Height of the top of PBL
Height of the tropopause
Integrated Water Vapour (IWV)
O3
O3 Total Column
Specific humidity
Temperature of the tropopause

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
Aerosol column burden	2 - very high	Cloud sensitive.. Daylight only.	Opportunity information from greenhouse gas NIR/SWIR spectrometer
Aerosol effective radius	2 - very high	Cloud sensitive.. Daylight only.	Opportunity information from greenhouse gas NIR/SWIR spectrometer
Aerosol mass mixing ratio	2 - very high	Cloud sensitive.. Daylight only.	Opportunity information from greenhouse gas NIR/SWIR spectrometer
Aerosol Optical Depth	2 - very high	Cloud sensitive.. Daylight only.	Opportunity information from greenhouse gas NIR/SWIR spectrometer
Aerosol type	2 - very high	Cloud sensitive.. Daylight only.	Opportunity information from greenhouse gas NIR/SWIR spectrometer
Atmospheric temperature*	2 - very high	Cloud sensitive.. Inaccurate in low troposphere.	TIR spectrometry in the 15 micrometer band
C2H2	2 - very high	Cloud sensitive.	TIR spectrometry. C2H2 lines around 7.5 and 13.7 micrometers
C2H6	2 - very high	Cloud sensitive.	TIR spectrometry. C2H6 lines around 12 micrometers
CFC-11	2 - very high	Cloud sensitive.. Coarse vertical resolution.	TIR spectrometry. CFC-11 lines around 9.2 and 11.7 micrometers
CFC-12	2 - very high	Cloud sensitive.	TIR spectrometry. CFC-12 lines around 8.8 and 10.8 micrometers
CH3Br	1 - primary	Cloud sensitive.	Spectrometry in the HC3Br bands around 6.7, 7.9 and 10.5 micrometers
CH4 mole fraction*	2 - very high	Cloud sensitive.	SWIR and TIR spectrometry. CH4 lines around 2.3 and 7.7 micrometers
ClONO2	1 - primary	Cloud sensitive.	MWIR and TIR spectrometry. ClONO2 lines around 5.7, 7.7 and 12.5 micrometers
Cloud cover	3 - high	Discontinuous coverage.	NIR. SWIR and TIR spectrometry
Cloud drop effective radius	4 - fair	At cloud top.. Daylight only.	NIR and SWIR spectrometry
Cloud ice effective radius	4 - fair	At cloud top.. Daylight only.	NIR and SWIR spectrometry
Cloud top height	2 - very high	Discontinuous coverage.	MWIR and TIR spectrometry in window and water vapour band (for emissivity) to estimate cloud top height from its temperature
Cloud top temperature	1 - primary	Discontinuous coverage.	TIR spectrometry in window and water vapour band (for emissivity)
Cloud type	3 - high	Discontinuous coverage.	NIR, SWIR and TIR spectrometry
CO	3 - high	Cloud sensitive.. Daylight only.	SWIR spectrometry. CO lines around 2.3 micrometers
CO2 mole fraction*	2 - very high	Cloud sensitive.	SWIR and TIR spectrometry. CO2 lines around 1.6, 2.1 and 15 micrometers
COS	3 - high	Cloud sensitive.. Coarse vertical resolution.	TIR spectrometry. COS lines around 11.6 micrometers
Downward long-wave irradiance at Earth surface	2 - very high	Cloud sensitive.. Highly indirect.	MWIR and TIR spectrometry including water vapour and CO2 bands
H2O*	2 - very high	Cloud sensitive.	MWIR/TIR spectrometry in a range centred on 6.3 micrometers
Height of the top of PBL*	5 - marginal	Cloud sensitive.	TIR spectrometry. Height of PBL top from temperature profile
Height of the tropopause*	3 - high	Cloud sensitive.	TIR spectrometry. Height of tropopause from temperature profile
HNO3	2 - very high	Cloud sensitive.. Coarse vertical resolution.	MWIR and TIR spectrometry. HNO3 lines around 5.9, 7.6 and 11.3 micrometers
Land surface temperature	4 - fair	Cloud sensitive.. Coarse spatial resolution.	TIR spectrometry (inclusive of several narrow-bandwidth windows and absorption bands for atmospheric corrections)
Long-wave Earth surface emissivity	2 - very high	Cloud sensitive.. Long time series needed.	MWIR and TIR spectrometry measuring land temperature in many windows. Emissivity inferred by statistical analysis
N2O mole fraction	1 - primary	Cloud sensitive.	SWIR and TIR spectrometry. N2O lines around 2.3 and 7.7 micrometers
N2O5	2 - very high	Cloud sensitive.. Coarse vertical resolution.	MWIR and TIR spectrometry. N2O5 lines around 5.8 and 8 micrometers
NO	2 - very high	Cloud sensitive.. Coarse vertical resolution.	MWIR spectrometry. NO lines around 5.3 micrometers
NO2	3 - high	Cloud sensitive.. Coarse vertical resolution.	TIR spectrometry. NO2 lines around 6.1 micrometers
NO2 Total Column	2 - very high	Cloud sensitive.	TIR spectrometry. NO2 lines around 6.1 micrometers
O3*	3 - high	Cloud sensitive.	TIR spectrometry. Ozone band around 9.7 micrometers
O3 Total Column*	3 - high	Cloud sensitive.	TIR channel(s). Ozone lines in band around 9.7 micrometers
PAN	2 - very high	Cloud sensitive.	MWIR and TIR spectrometry. PAN lines around 5.7, 8.6 and 12.5 micrometers
PSC occurrence	2 - very high	Coarse vertical resolution.	MWIR and TIR spectroscopy
Sea surface temperature	3 - high	Cloud sensitive.	TIR spectrometry (inclusive of several narrow-bandwidth windows and absorption bands for atmospheric corrections)
SF6	2 - very high	Cloud sensitive.. Coarse vertical resolution.	TIR spectrometry. SF6 lines around 10.5 micrometers
SO2	1 - primary	Cloud sensitive.	TIR spectrometry. SO2 lines around 7.3 and 8.6 micrometers
SO2 Total Column	1 - primary	Cloud sensitive.	TIR spectrometry. SO2 lines around 7.3 and 8.6 micrometers
Specific humidity*	1 - primary	Cloud sensitive.	TIR spectrometry in the water vapour band around 6.3 micrometers
Integrated Water Vapour (IWV)*	2 - very high	Cloud sensitive.	TIR spectrometry in the bands around 6.3 and above 11 micrometers
Temperature of the tropopause*	2 - very high	Cloud sensitive.	TIR spectrometry. Tropopause temperature from temperature profile
Upward spectral radiance at TOA	3 - high	Missing all Short-waves.	MWIR and TIR spectrometry resolving water vapour lines in the bands around 6.3 micrometers and 11 to 15 micrometers
Upward long-wave irradiance at TOA	3 - high	Spectral interpolation needed.	TIR spectrometry covering the 11 micrometers window region and the water vapour and CO2 bands around 6.3 and 15 micrometers
Aerosol volcanic ash	2 - very high	Cloud sensitive.. Daylight only.	Opportunity information from greenhouse gas NIR/SWIR spectrometer
Aerosol volcanic ash Total Column	2 - very high	Cloud sensitive.. Daylight only.	Opportunity information from greenhouse gas NIR/SWIR spectrometer
Wind (horizontal)	3 - high	Limited to high latitudes.. Cloud sensitive.	TIR spectrometry in the 6.3 micrometers band. Wind profile in clear air by tracking water vapour patches in the humidity profile
Upward long-wave irradiance at Earth surface	2 - very high	Cloud sensitive.. Highly indirect.	TIR spectrometry covering the 11 micrometers window region and the water vapour and CO2 bands around 6.3 and 15 micrometers