Overview of C2RCC neural network packages

Satellite

Sensor

Applicable to / Limits

Created

Name¹

GUI Item²

Comment
Landsat 7 OLI
Case-2 waters in general

min_log_a_pig = -6,91
max_log_apig = 1,79
min_log_bpart = -6,91
max_log_bpart = 5,52
min_log_bwit = -6,91
max_log_bwit = 6,21
min_log_agelb = -6,91
max_log_agelb = 3,09
min_log_adet = -6,91
max_log_adet = 3,91
min_chl (mg m-3) = 0,016
max_chl (mg m-3) = 135
min_tsm (g m-3) = 0,004
max_tsm (g m-3) = 541
ys_min (m-1) = 0,001
ys_max (m-1) = 21
det_min (m-1) = 0,001
det_max (m-1) = 49
cdom_min (m-1) = 0,002
cdom_max (m-1) = 70

 2017-09-17 c2rcc-l7-cc – –
Landsat 8 OLI
Case-2 waters in general

min_log_a_pig = -11,45
max_log_apig = 1,71
min_log_bpart = -6,91
max_log_bpart = 4,08
min_log_bwit = -6,91
max_log_bwit = 4,09
min_log_agelb = -9,9
max_log_agelb = 0
min_log_adet = -9,9
max_log_adet = 1,79
min_chl (mg m-3) = 0,0002
max_chl (mg m-3) = 124
min_tsm (g m-3) = 0,004
max_tsm (g m-3) = 95
ys_min (m-1) = 0,00006
ys_max (m-1) = 1
det_min (m-1) = 0,00006
det_max (m-1) = 5
cdom_min (m-1) = 0,0002
cdom_max (m-1) = 6

 2016-11-15 c2rcc-l8-cc C2RCC-Nets –
Landsat 8 OLI
Extreme case-2 waters

min_log_a_pig = -13,02
max_log_apig = 3,92
min_log_bpart = -6,91
max_log_bpart = 6,38
min_log_bwit = -6,91
max_log_bwit = 6,38
min_log_agelb = -9,9
max_log_agelb = 4,09
min_log_adet = -9,9
max_log_adet = 4,09
min_chl (mg m-3) = 0,0001
max_chl (mg m-3) = 1238
min_tsm (g m-3) = 0,004
max_tsm (g m-3) = 829
ys_min (m-1) = 0,00006
ys_max (m-1) = 59
det_min (m-1) = 0,00006
det_max (m-1) = 59
cdom_min (m-1) = 0,0002
cdom_max (m-1) = 118

 2016-08-18 c2rcc-l8-c2x C2X-Nets –
Envisat MERIS³
Case-2 waters in general

min_log_a_pig = -12,86
max_log_apig = 1,67
min_log_bpart = -6,91
max_log_bpart = 4,07
min_log_bwit = -6,91
max_log_bwit = 4,09
min_log_agelb = -9,9
max_log_agelb = 0
min_log_adet = -9,9
max_log_adet = 1,78
min_chl (mg m-3) = 0,0001
max_chl (mg m-3) = 119
min_tsm (g m-3) = 0,004
max_tsm (g m-3) = 95
ys_min (m-1) = 0,00006
ys_max (m-1) = 0
det_min (m-1) = 0,00006
det_max (m-1) = 5
cdom_min (m-1) = 0,0002
cdom_max (m-1) = 5

 2016-10-12 c2rcc-meris-cc C2RCC-Nets –
Envisat MERIS³
Extreme case-2 waters

min_log_a_pig = -12,89
max_log_apig = 3,94
min_log_bpart = -6,91
max_log_bpart = 6,38
min_log_bwit = -6,91
max_log_bwit = 6,38
min_log_agelb = -9,9
max_log_agelb = 4,08
min_log_adet = -9,9
max_log_adet = 4,08
min_chl (mg m-3) = 0,0001
max_chl (mg m-3) = 1265
min_tsm (g m-3) = 0,004
max_tsm (g m-3) = 830
ys_min (m-1) = 0,00006
ys_max (m-1) = 59
det_min (m-1) = 0,00006
det_max (m-1) = 59
cdom_min (m-1) = 0,0002
cdom_max (m-1) = 118

 2015-11-28 c2rcc-meris-c2x C2X-Nets –
Aqua MODIS
Case-2 waters in general

min_log_a_pig = -13,17
max_log_apig = 1,67
min_log_bpart = -6,91
max_log_bpart = 4,08
min_log_bwit = -6,91
max_log_bwit = 4,08
min_log_agelb = -9,9
max_log_agelb = 0
min_log_adet = -9,9
max_log_adet = 1,78
min_chl (mg m-3) = 0,0001
max_chl (mg m-3) = 119
min_tsm (g m-3) = 0,004
max_tsm (g m-3) = 94
ys_min (m-1) = 0,00006
ys_max (m-1) = 1
det_min (m-1) = 0,00006
det_max (m-1) = 5
cdom_min (m-1) = 0,0002
cdom_max (m-1) = 6

 2015-02-21 c2rcc-modis-cc – –
Sentinel-2 MSI⁴
Case-2 waters in general

min_log_a_pig = -11,45
max_log_apig = 1,71
min_log_bpart = -6,91
max_log_bpart = 4,08
min_log_bwit = -6,91
max_log_bwit = 4,09
min_log_agelb = -9,9
max_log_agelb = 0
min_log_adet = -9,9
max_log_adet = 1,79
min_chl (mg m-3) = 0,0002
max_chl (mg m-3) = 124
min_tsm (g m-3) = 0,004
max_tsm (g m-3) = 95
ys_min (m-1) = 0,00006
ys_max (m-1) = 1
det_min (m-1) = 0,00006
det_max (m-1) = 5
cdom_min (m-1) = 0,0002
cdom_max (m-1) = 6

 2016-05-02 c2rcc-s2-cc C2RCC-Nets –
Sentinel-2 MSI⁴
Extreme case-2 waters

min_log_a_pig = -10,54
max_log_apig = 3,83
min_log_bpart = -6,91
max_log_bpart = 6,37
min_log_bwit = -6,91
max_log_bwit = 6,39
min_log_agelb = -5,3
max_log_agelb = 4,09
min_log_adet = -5,3
max_log_adet = 4,09
min_chl (mg m-3) = 0,0004
max_chl (mg m-3) = 1125
min_tsm (g m-3) = 0,004
max_tsm (g m-3) = 829
ys_min (m-1) = 0,00501
ys_max (m-1) = 59
det_min (m-1) = 0,00501
det_max (m-1) = 59
cdom_min (m-1) = 0,0101
cdom_max (m-1) = 118

 2017-03-20 c2rcc-s2-c2x C2X-Nets –
Sentinel-2 MSI⁴
Complex extreme case-2 waters

min_log_a_pig = -9,06
max_log_apig = 3,43
min_log_bpart = -5,18
max_log_bpart = 6,84
min_log_bwit = -6,91
max_log_bwit = 6,75
min_log_agelb = -3,81
max_log_agelb = 1,45
min_log_adet = -4,94
max_log_adet = 2,84
min_chl (mg m-3) = 0,0018
max_chl (mg m-3) = 742
min_tsm (g m-3) = 0,01
max_tsm (g m-3) = 1225
ys_min (m-1) = 0,02209
ys_max (m-1) = 4
det_min (m-1) = 0,00718
det_max (m-1) = 17
cdom_min (m-1) = 0,0293
cdom_max (m-1) = 21

 2020-03-21 c2rcc-s2-c2x-complex C2X-COMPLEX-Nets –
Sentinel-3 OLCI⁵
Case-2 waters in general

min_chl (mg m-3) = 21
max_chl (mg m-3) = 212
min_tsm (g m-3) = 2,037
max_tsm (g m-3) = 2
ys_min (m-1) = 1
ys_max (m-1) = 1
det_min (m-1) = 1
det_max (m-1) = 1
cdom_min (m-1) = 2
cdom_max (m-1) = 2

 ? c2rcc-olci-v1 – Obsolete
Sentinel-3 OLCI⁵
Case-2 waters in general

min_log_a_pig = -7,11
max_log_apig = 1,99
min_log_bpart = -7,11
max_log_bpart = 5,72
min_log_bwit = -7,11
max_log_bwit = 6,41
min_log_agelb = -7,11
max_log_agelb = 3,29
min_log_adet = -7,11
max_log_adet = 4,11
min_chl (mg m-3) = 0,013
max_chl (mg m-3) = 166
min_tsm (g m-3) = 0,003
max_tsm (g m-3) = 653
ys_min (m-1) = 0,00082
ys_max (m-1) = 26
det_min (m-1) = 0,00082
det_max (m-1) = 60
cdom_min (m-1) = 0,0017
cdom_max (m-1) = 86

 2017-12-21 c2rcc-olci-v2 – –
SeaStar SeaWIFS
Case-2 waters in general

min_log_a_pig = -13,17
max_log_apig = 1,67
min_log_bpart = -6,91
max_log_bpart = 4,08
min_log_bwit = -6,91
max_log_bwit = 4,08
min_log_agelb = -9,9
max_log_agelb = 0
min_log_adet = -9,9
max_log_adet = 1,78
min_chl (mg m-3) = 0,0001
max_chl (mg m-3) = 119
min_tsm (g m-3) = 0,004
max_tsm (g m-3) = 94
ys_min (m-1) = 0,00006
ys_max (m-1) = 1
det_min (m-1) = 0,00006
det_max (m-1) = 5
cdom_min (m-1) = 0,0002
cdom_max (m-1) = 6

 2015-02-21 c2rcc-seawifs-cc – –
Suomi NPP VIIRS
Case-2 waters in general

min_log_a_pig = -13,17
max_log_apig = 1,67
min_log_bpart = -6,91
max_log_bpart = 4,08
min_log_bwit = -6,91
max_log_bwit = 4,08
min_log_agelb = -9,9
max_log_agelb = 0
min_log_adet = -9,9
max_log_adet = 1,78
min_chl (mg m-3) = 0,0001
max_chl (mg m-3) = 119
min_tsm (g m-3) = 0,004
max_tsm (g m-3) = 94
ys_min (m-1) = 0,00006
ys_max (m-1) = 1
det_min (m-1) = 0,00006
det_max (m-1) = 5
cdom_min (m-1) = 0,0002
cdom_max (m-1) = 6

 2015-02-21 c2rcc-viirs-cc – –

¹ The designation is purely semantic and does not correspond to actual file names
² For some sensors different neural network packages exist for different applications,
which can be selected in the GUI of the C2RCC processor.
³ Includes MERIS data from both 3rd and 4th reprocessing
⁴ Includes MSI data from both Sentinel 2A and 2B
⁵ Includes OLCI data from both Sentinel 3A and 3B

IOP to concentration conversion

The native output of the neural nets are inherent optical properties (absorption and scattering) of the water. Their magnitude relates to mass concentrations of water constituents, like Chl-a pigment or total suspended matter. The conversion of IOPs into mass concentration depends on the specific properties of the water and may depend on local conditions. The C2RCC processors includes a parametric conversion of the IOPs output of the neural net into mass concentration of Chl and TSM:
CHL = chl_fac * iop_apig^chl_exp
TSM = tsm_fac * iop_btot^tsm_exp
The processor is delivered with default values for the parameters. They have been derived primarily from regression analysis of NOMAD data, complemented by data from various ship cruises. Because of the global coverage of NOMAD, the defaults are globally applicable. However, conversion factors derived from local measurements may give better results.
The defaults are:
chl_fac = 21.0; chl_exp = 1.04
tsm_fac = 1.06; tsm_exp = 0.942