Calibration Service

The world class calibration facilities of the Field Spectroscopy Facility are available to academic and research institutes in the UK and Europe for the calibration of remote sensing field spectroradiometers. These services include the system response calibration of instruments for spectral radiance and irradiance measurements and the calibration of reference panels for spectral diffuse reflectance measurements. The facility also offers a wavelength validation service for quantifying the spectroradiometer's wavelength scale errors.

Tables 1 & 2 - Calibrated Standards & Darkroom Equipment
Tables 3 & 4 - Calibration Services & Costs

Calibration Standards & Equipment

Table 1 lists the National Physical Laboratory (NPL) calibrated standards used by the facility to perform the calibration services. Addition items of equipment used in the laboratory are listed in table 2.

Table 1 Calibration Standards
Spectral Standard Equipment Spectral Range NPL Certificate No.
Spectral radiance source Sphere Optics LR-20 custom sphere source 380 - 2500 nm 2013030091-RB4-13
Spectral irradiance source Gooch & Housego 1KWatt FEL lamp 250 - 2500 nm 2014040396-IB4-14
Spectral reflectance panel Labsphere SRT-99-050 Spectralon target 380 - 2500 nm E05090223

Table 2 Additional Equipment
Equipment Services
Macam L203 photometer Independent verification of illuminance & luminance levels
Macam SMU203 spot measurement accessory Independent verification of radiance source luminance levels
Optronic Laboratories OL 83A stabilised current source Stabilised power supply for FEL irradiance standard
Mercury-argon spectral line soucre Wavelength scale verification (365, 404.7, 435.8, 546.1, ..... 912 nm)
Labsphere erbium oxide doped reflectance panel Wavelength scale verification (488, 522.2, 653.9, 799.2 .. 1534.4 nm)
NPL calibrated McCrone filter Wavelength scale verification (481, 588.6, 748.4, 869.2 .. 2326.8 nm)
NSIT calibrated Mylar sheet Wavelength scale verification (1128.7, 1659.9, 1904.6, ... 2444.5 nm)
Analytical Spectral Devices filter wheel & fibre source ASD FieldSpec Pro linearity and noise tests

Calibration Services & Costs

Tables 3 and 4 list the services available from the Field Spectroscopy Facility for system response calibration and wavelength verification respectively.

Table 3 System Response Calibration for Spectral Radiance & Irradiance Measurements
System Fore optics Calibration Service Cost (inc. VAT)
ASD FieldSpec Handheld Fixed 25° FOV Lens Spectral radiance 325 - 1075 nm XXX
ASD FieldSpec VNIR Fibre optic probe with one FOV lens Spectral radiance 350 - 1050 nm XXX
ASD FieldSpec VNIR Fibre optic probe with two FOV lenses Spectral radiance 350 - 1050 nm XXX
ASD FieldSpec VNIR Fibre optic probe with remote cosine receptor Spectral irradiance 350 - 1050 nm XXX
ASD FieldSpec FR & 3 Fibre optic probe with one FOV lens Spectral radiance 350 - 2500 nm XXX
ASD FieldSpec FR & 3 Fibre optic probe with two FOV lenses Spectral radiance 350 - 2500 nm XXX
ASD FieldSpec FR & 3 Fibre optic probe with remote cosine receptor Spectral irradiance 350 - 2200 nm XXX
Spectra Vista GER 1500 Standard or wide FOV lenses Spectral radiance 350 - 1090 nm XXX
Spectra Vista GER 1500 Standard & wide FOV lenses Spectral radiance 350 - 1090 nm XXX
Spectra Vista GER 1500 Standard lens with cosine diffuser Spectral irradiance 350 - 1090 nm XXX
Spectra Vista GER 1500 Fibre optic probe with cosine diffuser Spectral irradiance 350 - 1090 nm XXX
Spectra Vista GER 3700 Standard & wide FOV lenses Spectral radiance 350 - 2500 nm XXX
Spectra Vista GER 3700 Fibre optic probe with 25° FOV Spectral radiance 350 - 2500 nm XXX

Table 4 Verification of spectroradiometer wavelength scale calibration
System Fore optics Wavelength References Cost (inc. VAT)
ASD FieldSpec Handheld Fixed 25° lens Spectral line lamps, McCrone filter XXX
ASD FieldSpec VNIR Fibre optic probe with FOV lenses or RCR Spectral line lamps, McCrone filter XXX
ASD FieldSpec FR & 3 Fibre optic probe with FOV lenses or RCR Spectral line lamps, McCrone & mylar filters, erbium doped panel XXX
Spectra Vista GER 1500 Standard & wide FOV lenses Spectral line lamps, McCrone filter XXX
Spectra Vista GER 1500 Standard lens with cosine diffuser Spectral line lamps, McCrone filter XXX
Spectra Vista GER 1500 Fibre optic probe with cosine diffuser Spectral line lamps, McCrone filter XXX
Spectra Vista GER 3700 Standard & wide FOV lenses Spectral line lamps, McCrone & mylar filters, erbium doped panel XXX
Spectra Vista GER 3700 Fibre optic probe with 25° FOV Spectral line lamps, McCrone & mylar filters, erbium doped panel XXX