APS

Aerosol Polarimetry Sensor

Satellites

Glory, (NPOESS 1 and 3)

Status

Being integrated for Glory; currently not baselined for NPOESS - To be utilised in the period 2009 to ~ 2012 on Glory, ~ 2027 if also on NPOESS 1/3

Mission

Aerosol optical thickness, size distribution and shape

Instrument type

9-channel VIS/NIR/SWIR polarimeter with multi-angle capability

Scanning technique

Along-track viewing only, fore- and aft- ± 60° (250 steps of 8 mrad), one full measurement every 8.8.km

Coverage/cycle

30000 measurements/day at 8.8 km intervals – Global coverage (25 km average spacing) in 30 days

Resolution s.s.p.

10 km IFOV

Resources

Mass: 58 kg - Power: 45 W - Data rate: 160 kbps

Central wavelength

Bandwidth

Polarisations

Radiometric accuracy (SNR)

412 nm

20 nm

0, 45, 90 and 135 degrees

........ @ .... % albedo

445 nm

18 nm

0, 45, 90 and 135 degrees

........ @ .... % albedo

488 nm

20 nm

0, 45, 90 and 135 degrees

........ @ .... % albedo

555 nm

20 nm

0, 45, 90 and 135 degrees

........ @ .... % albedo

672 nm

20 nm

0, 45, 90 and 135 degrees

........ @ .... % albedo

746 nm

15 nm

0, 45, 90 and 135 degrees

........ @ .... % albedo

865 nm

39 nm

0, 45, 90 and 135 degrees

........ @ .... % albedo

1240 nm

20 nm

0, 45, 90 and 135 degrees

........ @ .... % albedo

1378 nm

15 nm

0, 45, 90 and 135 degrees

........ @ .... % albedo

1610 nm

60 nm

0, 45, 90 and 135 degrees

........ @ .... % albedo

2250 nm

50 nm

0, 45, 90 and 135 degrees

........ @ .... % albedo