Campbell Open Path Eddy Covariance System Instrukcja Operatora Pobierz pdf (Strona 41)

Appendix A. CSAT3 Orientation

A.1 Determining True North and Sensor Orientation

The orientation of the CSAT3 negative x-axis is found by reading a magnetic

compass and applying the site-specific correction for magnetic declination;

where the magnetic declination is the number of degrees between True North

and Magnetic North. Magnetic declination for a specific site can be obtained

from a USGS map, local airport, or through a NOAA web calculator (Section

A.2). A general map showing magnetic declination for the Conterminous

United States in 2004 is shown in FIGURE A-1.

FIGURE A-1. Magnetic declination for the conterminous United States

(2004)

A-1

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 55 56

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Campbell Open Path Eddy Covariance System Instrukcja Operatora Strona 41