Patent ID: 11879985
Assignee: nan
Field: Measurement (Instruments)
Classification: CPC G  A | IPC A  G

Claim 12:
13. The irrigation monitoring system according to claim 11, wherein said means for processing said GNSS coordinates is programmed to convert the latitude of said GNSS coordinates to spherical coordinates by adding 90° and sign inversion, and said geometric relationship is represented by equation:

cos Ω=sin θb cos φb sin θc cos φc+sin θb sin φb sin θc sin φc+cos θb cos θc 

where Ω is the angle between the slant height and center height of the cone, θb is the updated latitude of a point along the base perimeter of the cone, φb is the longitude of the point along the base perimeter of the cone, θc is the updated latitude of the point located in the center of the base of the cone, and φc is the longitude of the point located in the center of the base of the cone.