Airborne / Airborne Imaging Spectrometer for Applications (AISA)

Owned by Maiwenn Herpe
Last updated: Jun 21, 2021 by Frederika Mourot
1 min read

Examples of potential applications

  • Airborne spectrometer is used to monitor for Chlorophyll-a of Finnish lakes.

  • Ground truth measurements were also collected including: (i) water samples for laboratory analysis (e.g. Chlorophyll-a, turbidity), (ii) on-site measurements (e.g. Secchi-depth, hand-held spectrometer); and (iii) weather data (e.g. wind speed and direction, air and water surface temperature).

Range of flight height and captured zone width (m)

Flight altitude: c. 1000 m.

Spectral Range (nm)

Channels covered the 450–750 nm range almost continuously.

Spatial Resolution (m)

4.5 m.

Benefits

  • The use of a bidirectional scattering model and atmospheric correction reduces the bias component of the measurement error.

  • Radiometer data also appear to improve the accuracy.

Limitations

  • If concurrent in-situ reference data are not available, the retrieval algorithms and correction methods should be improved for reducing the bias error.

Selection of references

Koponen S, Pulliainen J, Servomaa H, Zhang Y, Hallikainen M, Kallio K, Vepsäläinen J, Pyhälahti T, Hannonen T. 2001. Analysis on the feasibility of multi-source remote sensing observations for chl-a monitoring in Finnish lakes. Science of The Total Environment. 268(1):95-106. doi:https://doi.org/10.1016/S0048-9697(00)00689-6.

Rissmann CL, J.; Couldrey, M.; Pearson, L. 2019. Mapping of Northland’s hydric soils, wetlands, and water bodies. Invercargill, NZ: Land and Water Science. 34 p.

https://www.envirolink.govt.nz/assets/Envirolink/Reports/1955-NLRC214-Mapping-of-Northlands-hydric-soils-wetlands-and-water-bodies.pdf