120
The NERC-EPFS Tutor has proved to be very useful both as an introduction for novice users
and as a highly-visual overview of the Pool and its activities for senior managers in the UK Natural
Environment Research Council and this encouraged the development of a further Toolbook application
designed to explore in more detail those factors which determine the accuracy and precision of data collected
with field spectroradiometers.
&
Natural
Environment
Research
Council
EQUIPMENT POOL FOR FIELD SPECTROSCOPY
Æm
Methodology
Examples of Loan
Example Library
Projects
Procedures Spectra
frit or-z C iiiütfif: iasfi'-. xbtr.'C nr
Figure 1. Opening screen of the NERC-EPFS tutor.
3. HYPERTEXT APPLICATION 2: THE ACCURACY OF FIELD SPECTROSCOPY
This hypertext application is built more closely on the book metaphor than the NERC-EPFS Tutor shown in
figure 1. The opening screen shows a list of topic titles on the left, each of which when activated reveals a
series of subsections. Figure 2 shows the screen display after the user has clicked on the main topic entitled
'Instrument characteristics'. Double-clicking on one of the sub-sections then takes the user to the first of a series
of panels relevant to that topic. The user may choose to work through the material in a linear fashion or may
take advantage of hypertext links within sections to follow through a particular line of interest.
Since the application is interactive by nature it is difficult to describe in a printed paper, so
instead, a selection of the information it contains on errors in field spectroscopy will be described.
Accuracy of Field Spectroscopy
Instrument characteristics
Primary standards
Radiometric linearity
Radiometric precision
Panel characteristics
Wavelength precision
Environmental factors
Temperature sensitivity
Measurement Methodology
FOV ctiaracloristics
Radiometric calibration
| SfrcBort |
] Hdp j Ctose*«: Wartboot |
8Dt of 691
Figure 2. Opening screen of the hypertext application on the accuracy and precision of field spectroscopy
