Optical Imaging and Field Spectroscopy: CLPX 2002 and 2003 Thomas H. Painter.

Optical Imaging and Field Spectroscopy:CLPX 2002 and 2003Thomas H. Painter

8th CLP Workshop, Boulder, CO

Spectroscopists

• Rick Forster (U of Utah)• Nate Mulherin (CRREL)• H.P. Marshall (U of Colorado)• Elke Ochs (CRREL)• Janet Hardy (CRREL)• Michael Eastwood, Chuck

Sarture, Ian McCubbin, Robert Green (JPL)


Hyperspectral Remote Sensing

• Greatest spectral leverage for– Subpixel snow covered area– Canopy closure– Subpixel snow grain size– Snow impurity concentrations– Subpixel snow albedo– Snow surface liquid water content– Vegetation classification (e.g. Potter Creek Site)

• Nadir view maximum viewable snow cover


Hyperspectral Remote Sensing

• Comparisons and complementary data– Snow covered area (passive, radar)– Grain size (passive, radar)– Snow liquid water content (passive, radar)– Canopy closure (passive, radar)

• Field spectral albedo comparisons with field passive and radar instrumentation

• Demonstration of complementary spaceborne instrumentation (Hyperion+)


Instruments

• NASA Earth Observing-1 Hyperion (spaceborne)

• NASA/JPL Airborne Visible Infrared Imaging Spectrometer (AVIRIS) (airborne)

• Analytical Spectral Devices Full-Range Field Spectroradiometer (field)


EO-1 HyperionSpectral range 0.4 2.5

m

Number of bands

220

Spatial resolution

30 m

Swath Width 7.8 km

Repeat Cycle 16 days

Local acquisition time

10:30 A.M.

Signal to Noise 40-160


Airborne Visible Infrared Imaging Spectrometer

(AVIRIS)Spectral range

0.4 2.5 m

Number of bands

224

Spatial resolution

20 m (nominal)1.5 m (low alt)

Swath Width 12 km1 km (low alt)

Local acquisition time

variable

Signal to Noise

500-1200


ASD FR Field Spectroradiometer

Spectral range 0.35 – 2.5 m

Spectral resolution

0.003 – 0.010 m

Spectral sampling

0.0014 – 0.002 m

Weight 7.2 kg


ACQUISITIONS

HYPERION

February 15, 2002

Fraser MSA

R: 0.66 m

G: 0.91 m

B: 1.33 m

Fraser Experimenta

l Forest

7.8 km

N


ACQUISITIONS

HYPERION

March 19, 2002

Fraser MSA

R: 0.66 m

G: 0.91 m

B: 1.33 m

Fraser Experimenta

l Forest

N


Fraser MSA

St. Louis Creek ISA

Fool Creek ISA

Alpine ISA

LSOS

HYPERION

March 19, 2002

Fraser MSA

R: 0.66 m

G: 0.91 m

B: 1.33 m


Field Calibration


LSOS Field Spectra


LSOS Field Spectra

March 31, 2002, IOP-2

= 36°, = 0°


Field Calibration


Hyperion – calibrated spectra

Field calibrated

wavelength (m)

1.0

0.8

0.6

0.4

0.2

0.0re

flect

ance

Hatch retrieved

wavelength (m)

1.0

0.8

0.6

0.4

0.2

0.0

reflect

ance


AVIRISCLPX Acquisitions


2002 Acquisitions

Fraser MSA, April 4, 2002


ACQUISITIONS

Fraser MSA, April 4, 2002


ACQUISITIONS

AVIRIS

April 4, 2002

Rabbit Ears MSA

R: 0.66 mG: 0.91 mB: 1.33 m

N


ACQUISITIONS

AVIRIS

April 4, 2002

Rabbit Ears MSA

R: 0.66 mG: 0.91 mB: 1.33 m

N


ACQUISITIONS

AVIRIS

April 4, 2002

Rabbit Ears MSA

R: 0.66 mG: 0.91 mB: 1.33 m

N


ACQUISITIONS

AVIRIS

April 5, 2002

North Park MSA

R: 0.66 mG: 0.91 mB: 1.33 m

N


ACQUISITIONS

AVIRIS

April 4, 2002

Fraser MSA

(Alpine ISA)

R: 0.66 mG: 0.91 mB: 1.33 m

N


Vegetation Classification

RGB Minimum Distance

Potter Creek ISA/NCAR Tower - April 4, 2002


Mt. Rainier, WAUSA4393 mAVIRIS14 June 1996

= 409.4 nm

= 1324.0 nm

= 2269.3 nm



Water Vapor



Liquid Water



Ice/Snow



= Water Vapor

= Liquid Water

= Ice/Snow


2003 CLPX Acquisitions (Quicklooks) – February

19

Fraser Experimental Forest MSA


Hyperion Distribution

http://nsidc.org/data/clpx/


AVIRIS Distribution

http://nsidc.org/data/clpx/

Optical Imaging and Field Spectroscopy: CLPX 2002 and 2003 Thomas H. Painter.

Documents

th clp workshop

field calibration slide

reflectance slide

painter slide

field passive

acquisitions fraser

acquisitions hyperion

hyperion spectral range