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Optical Backscattering Measured by Airborne Lidar and Underwater Glider
- Source :
- Remote Sensing, Vol 9, Iss 4, p 379 (2017), Remote Sensing, Volume 9, Issue 4, Pages: 379
- Publication Year :
- 2017
- Publisher :
- MDPI AG, 2017.
-
Abstract
- The optical backscattering from particles in the ocean is an important quantity that has been measured by remote sensing techniques and in situ instruments. In this paper, we compare estimates of this quantity from airborne lidar with those from an in situ instrument on an underwater glider. Both of these technologies allow much denser sampling of backscatter profiles than traditional ship surveys. We found a moderate correlation (R = 0.28, p < 10−5), with differences that are partially explained by spatial and temporal sampling mismatches, variability in particle composition, and lidar retrieval errors. The data suggest that there are two different regimes with different scattering properties. For backscattering coefficients below about 0.001 m−1, the lidar values were generally greater than the glider values. For larger values, the lidar was generally lower than the glider. Overall, the results are promising and suggest that airborne lidar and gliders provide comparable and complementary information on optical particulate backscattering.
- Subjects :
- underwater glider
Particle composition
010504 meteorology & atmospheric sciences
Meteorology
Backscatter
Underwater glider
Scattering
Glider
Sampling (statistics)
01 natural sciences
010309 optics
Lidar
ocean optics
ocean remote sensing
0103 physical sciences
General Earth and Planetary Sciences
Environmental science
lcsh:Q
lcsh:Science
lidar
0105 earth and related environmental sciences
Remote sensing
Subjects
Details
- ISSN :
- 20724292
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- Remote Sensing
- Accession number :
- edsair.doi.dedup.....64324869e81ca09b17159122dbcf84b8