Supported ENVISAT Products |

## Level 2 GADS Scaling Factors and Offsets

Fields of ENVISAT MER_RR__2P_GADS_sfgi Records

Index | Identifier | Field Type | Field Length | Description | Units
0 | `"sf_alt"` | Float | 1 | scaling factor - altitude | -
1 | `"sf_rough"` | Float | 1 | scaling factor - roughness | -
2 | `"sf_zon_wind"` | Float | 1 | scaling factor - zonal wind | -
3 | `"sf_merr_wind"` | Float | 1 | scaling factor - meridional wind | -
4 | `"sf_atm_pres"` | Float | 1 | scaling factor - atmospheric pressure | -
5 | `"sf_ozone"` | Float | 1 | scaling factor - ozone | -
6 | `"sf_rel_humid"` | Float | 1 | scaling factor - relative humidity | -
7 | `"sf_reflec"` | Float | 13 | scaling factor - reflectances | -
8 | `"sf_algal_pig_ind"` | Float | 1 | scaling factor - Algal pigment index | -
9 | `"sf_yellow_subs"` | Float | 1 | scaling factor - Yellow substance | -
10 | `"sf_susp_sed"` | Float | 1 | scaling factor - Suspended sediment | -
11 | `"sf_aero_epsilon"` | Float | 1 | scaling factor - Aerosol epsilon | -
12 | `"sf_aer_opt_thick"` | Float | 1 | scaling factor - Aerosol optical thickness | -
13 | `"sf_cl_opt_thick"` | Float | 1 | scaling factor - Cloud optical thickness | -
14 | `"sf_surf_pres"` | Float | 1 | scaling factor - Surface pressure | -
15 | `"sf_wvapour"` | Float | 1 | scaling factor - Water vapour | -
16 | `"sf_photosyn_rad"` | Float | 1 | scaling factor - Photosynthetically active radiation | -
17 | `"sf_toa_veg"` | Float | 1 | scaling factor - TOA Vegetation index | -
18 | `"sf_boa_veg"` | Float | 1 | scaling factor - BOA Vegetation index | -
19 | `"sf_cloud_albedo"` | Float | 1 | scaling factor - Cloud Albedo | -
20 | `"sf_cloud_top_press"` | Float | 1 | scaling factor - Cloud Top Pressure | -
21 | `"off_reflec"` | Float | 13 | offset - reflectances | -
22 | `"off_algal"` | Float | 1 | offset - Algal pigment index | log10(mg.m-3)
23 | `"off_yellow_subs"` | Float | 1 | offset - Yellow substance | m-1
24 | `"off_total_susp"` | Float | 1 | offset - Total suspended matter | log10(g.m-3)
25 | `"off_aero_epsilon"` | Float | 1 | offset - Aerosol epsilon | -
26 | `"off_aer_opt_thick"` | Float | 1 | offset - Aerosol optical thickness | -
27 | `"off_cl_opt_thick"` | Float | 1 | offset - Cloud optical thickness | -
28 | `"off_surf_pres"` | Float | 1 | offset - Surface pressure | hPa
29 | `"off_wvapour"` | Float | 1 | offset - Water vapour | g.cm-2
30 | `"off_photosyn_rad"` | Float | 1 | offset - Photosynthetically active radiation | W.m-2
31 | `"off_toa_veg"` | Float | 1 | offset - TOA Vegetation index | -
32 | `"off_boa_veg"` | Float | 1 | offset - BOA Vegetation index | -
33 | `"off_cloud_albedo"` | Float | 1 | offset - Cloud Albedo | -
34 | `"off_cloud_top_press"` | Float | 1 | offset - Cloud Top Pressure | hPa
35 | `"gain_set"` | UChar | 5*16 | Gain setting | -
36 | `"sampl_rate"` | ULong | 1 | sampling rate | (10-6) s
37 | `"sun_spec_flux"` | Float | 15 | Sun Spectral Flux (for bands 1-15) | LU
38 | `"sf_rect_refl_nir"` | Float | 1 | scaling factor - Rectified near infrared reflectance | -
39 | `"off_rect_refl_nir"` | Float | 1 | offset - Rectified near infrared reflectance | -
40 | `"sf_rect_refl_red"` | Float | 1 | scaling factor - Rectified infrared reflectance | -
41 | `"off_rect_refl_red"` | Float | 1 | offset - Rectified infrared reflectance | -
42 | `"spare_1"` | Spare | 44 | spare | -