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Clark et. al. 2003 USGS Open File Report 03-395
Spectral Library splib05a Sample Description

(For further information on spectrsocopy, see: http://speclab.cr.usgs.gov)

TITLE: Cactus Opuntia-1 Purple_pad DESCRIPT

DOCUMENTATION_FORMAT: Plant

SAMPLE_ID: Opuntia-1

PLANT_TYPE: Cactus

PLANT: Santa Rita Purple Prickly Pear Cactus

LATIN_NAME: Opuntia violacea var. santa-rita

COLLECTION_LOCALITY: Patagonia, Arizona

ORIGINAL_DONOR:

SAMPLE_DESCRIPTION:

Average reflectance of a pad of purple prickly pear cactus (Opuntia violacea var. santa-rita) measured in the field using a field spectrometer. The cactus pad was pushed into a nearly horizontal position and the head of the spectrometer (bare fiber optic) was pointed at an approximately 20 degree off-nadir orientation. The spectrometer head was approximately 8 cm from the surface of the pad and was moved around the surface of the cactus pad as the field spectrometer measured the reflectance. This average spectrum was computed from 16 recorded spectra (each recorded spectrum was an average of 60 measurements). The sky was cloud-free during the measurement.

Photos of the sample:

END_SAMPLE_DESCRIPTION.

COMPOSITIONAL_ANALYSIS_TYPE: none

COMPOSITION_DISCUSSION:

END_COMPOSITION_DISCUSSION.

TRACE_ELEMENT_ANALYSIS:

TRACE_ELEMENT_DISCUSSION:

END_TRACE_ELEMENT_DISCUSSION.

SPECTROSCOPIC_DISCUSSION:

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1a2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

LIB_SPECTRA_HED: where Wave Range Av_Rs_Pwr Comment
LIB_SPECTRA: splib05a r 10802 0.2-3.0µm 200


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