Table 2 Principal specifications of TANSO-FTS-2 compared with TANSO-FTS

Measured gases

CO₂, CH₄, O₃, H₂O, CO

CO₂, CH₄, O₃, H₂O

FOV

15.8 mrad (9.7 km)

15.8 mrad (10.5 km)

Spectral ranges (μm) (cm−1)

Band 1: 0.75–0.77 (12,950–13,250)

Band 1: 0.75–0.77 (12,900–13,200)

Band 2: 1.56–1.69 (5900–6400)

Band 2: 1.56–1.72 (5800–6400)

Band 3: 1.92–2.33 (4200–5200)

Band 3: 1.92–2.08 (4800–5200)

Band 4: 5.5–8.4 (1188–1800)

Band 4: 5.5–14.3 (700–1800)

Band 5: 8.4–14.3 (700–1188)

SNR(@standard radiance)

Band 1: > 400 (P@13,050 cm⁻¹)

Band 1: > 300

Band 2: > 300 (P@6,200 cm⁻¹)

Band 2: > 300

Band 3: > 300 (P@5,000 cm⁻¹)

Band 3: > 300

 > 300 (P + S@4,250 cm⁻¹)

Band 4: > 300

Band 4: > 300 (@1,300 cm⁻¹)

Band 5: > 300 (@700 cm⁻¹)

Observation mesh

160 km (5 points in the CT direction)

160 km (5 points in the CT direction)

Scan duration

4 s/interferogram

4, 2, 1.1 s/interferogram

Sampling resolution

0.2 cm⁻¹

0.2 cm⁻¹

Effective aperture size

Φ73 mm

Φ64 mm

Gain steps

16

2

Avoidance of the cloud

Intelligent pointing

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