Campbell-scientific CS470/CS471 Compact Bubbler System Manuale Utente Scaricare il pdf (Pagina 44)

Appendix D. SDI-12 Sensor Support

0.003086 m/s

for each kilometer above sea level. With the following formula

the local gravitational constant g in m/s

can be calculated:

g = 9.780356 * (1 + 0.0052885 sin

 -0.0000059 sin

2) -0.003086 h

where  is the degrees of latitude and h the height above sea level in km.

(Jursa, A.S., Ed., Handbook of Geophysics and the Space Environment, 4

ed.,

Air Force Geophysics Laboratory, 1985, pp. 14-17).

Example: At a height above mean sea level of 0.669 km and a latitude of

47.71°, a gravitational constant of 9.80659 m/s

results.

D-8

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Campbell-scientific CS470/CS471 Compact Bubbler System Manuale Utente Pagina 44