Abstract
| Language | English |
|---|---|
| Pages | 2804-2810 |
| Number of pages | 7 |
| Journal | Applied Optics |
| Volume | 42 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - 2003 |
Fingerprint
Keywords
- absorption
- backscattering
- radiometric measurements
Cite this
}
Estimation of absorption and backscattering coefficients from in situ radiometric measurements: theory and validation in case 2 waters. / McKee, D.J.C.; Cunningham, A.; Craig, S.E.
In: Applied Optics, Vol. 42, No. 15, 2003, p. 2804-2810.Research output: Contribution to journal › Article
TY - JOUR
T1 - Estimation of absorption and backscattering coefficients from in situ radiometric measurements: theory and validation in case 2 waters
AU - McKee, D.J.C.
AU - Cunningham, A.
AU - Craig, S.E.
PY - 2003
Y1 - 2003
N2 - A model that relates the coefficients of absorption (a) and backscattering (bb) to diffuse attenuation (Kd), radiance reflectance (RL), and the mean cosine for downward irradiance (μd) is presented. Radiance transfer simulations are used to verify the physical validity of the model for a wide range of water column conditions. Analysis of these radiance transfer simulations suggests that absorption and backscattering can be estimated with average errors of 1% and 3%, respectively, if the value of μd is known with depth. If the input data set is restricted to variables that can be derived from measurements of upward radiance (Lu) and downward irradiance (Ed), it is necessary to use approximate values of μd. Examination of three different approximation schemes for μd shows that the average error for estimating a and bb increases to ~13%. We tested the model by using measurements of Lu and Ed collected from case II waters off the west coast of Scotland. The resulting estimates of a and bb were compared with independent in situ measurements of these parameters. Average errors for the data set were of the order of 10% for both absorption and backscattering.
AB - A model that relates the coefficients of absorption (a) and backscattering (bb) to diffuse attenuation (Kd), radiance reflectance (RL), and the mean cosine for downward irradiance (μd) is presented. Radiance transfer simulations are used to verify the physical validity of the model for a wide range of water column conditions. Analysis of these radiance transfer simulations suggests that absorption and backscattering can be estimated with average errors of 1% and 3%, respectively, if the value of μd is known with depth. If the input data set is restricted to variables that can be derived from measurements of upward radiance (Lu) and downward irradiance (Ed), it is necessary to use approximate values of μd. Examination of three different approximation schemes for μd shows that the average error for estimating a and bb increases to ~13%. We tested the model by using measurements of Lu and Ed collected from case II waters off the west coast of Scotland. The resulting estimates of a and bb were compared with independent in situ measurements of these parameters. Average errors for the data set were of the order of 10% for both absorption and backscattering.
KW - absorption
KW - backscattering
KW - radiometric measurements
U2 - 10.1364/AO.42.002804
DO - 10.1364/AO.42.002804
M3 - Article
VL - 42
SP - 2804
EP - 2810
JO - Applied Optics
T2 - Applied Optics
JF - Applied Optics
SN - 1559-128X
IS - 15
ER -