Theil-Sen estimated median change in rain normalised soil moisture 2001-2016, Indonesia

Map: Theil-Sen estimated median change in rain normalised soil moisture 2001-2016, Indonesia

Landsat bands

Landsat and Sentinel bands:

sensor band Wavelength
Landsat Band 1 - Coastal aerosol 0.43-0.45
Landsat Band 2 - Blue 0.45-0.51
Landsat Band 3 - Green 0.53-0.59
Landsat Band 4 - Red 0.64-0.67
Landsat Band 5 - Near Infrared (NIR) 0.85-0.88
Landsat Band 6 - SWIR 1 1.57-1.65
Landsat Band 7 - SWIR 2 2.11-2.29
     
Sentinel Band 1 - Coastal aerosol 0.443
Sentinel Band 2 - Blue 0.490
Sentinel Band 2 - Blue 0.490
Sentinel Band 3 - Green 0.560
Sentinel Band 4 - Red 0.665
Sentinel Band 5 - Red Edge 0.705
Sentinel Band 6 - Red Edge 0.740
Sentinel Band 7 - Red Edge 0.783
Sentinel Band 8 - Near Infrared (NIR) 0.842
Sentinel Band 8A - Red Edge 0.865
Sentinel Band 9 - Water vapour 0.945
Sentinel Band 10 - SWIR cirrus 1.375
Sentinel Band 11 - SWIR 1 1.610
Sentinel Band 12 - SWIR 2 2.190

Pyreos PY2572 1-4 channel analog sensors do not cover this range.

Hamamatsu IR sensors

P10090-01 (non-cooled) https://www.hamamatsu.com/resources/pdf/ssd/p10090-01_etc_kird1099e.pdf

Light resources

For the VIS-NIR region, standard lamps (white LED, xenon, OSRAM NIR) are OK. The problem is to identify suitable lamps and sensor for the region 1300 to 2400 nm.

IHeimannSensor offers the low cost and robust HSL series that should be possible to build directly into an microcontroller using a MOSFET. But it is doubtful whether it comes down all the way to 1300 nm.

IBSG (Russia) offers IR LED emitters with fixed wavelengths from 0.7 to 5.0 um. Covering the Landsat/Sentinel spectral bands, the following alternatives are available:

Hamamatsu has a lamp at 1.55 um with a half-width of 120 nm, L12509-0155P

Sensors (Photodiods)

IBSG Photodiodes for 0.8-2.4 µm spectral range