| 3 |
michaesp |
1 |
.TH geo2rot
|
|
|
2 |
.SH NAME
|
|
|
3 |
.B geo2rot - rotate from true to rotated longitude and latitude
|
|
|
4 |
.SH SYNOPSIS
|
|
|
5 |
.TP 9
|
|
|
6 |
.B geo2rot
|
|
|
7 |
.I [ inpfile outfile ] [optional parameters]
|
|
|
8 |
.TP 9
|
|
|
9 |
.B geo2rot
|
|
|
10 |
.I [ lon lat ] [optional parameters]
|
|
|
11 |
.TP 9
|
|
|
12 |
.B geo2rot
|
|
|
13 |
.I [optional parameters]
|
|
|
14 |
.SH DESCRIPTION
|
|
|
15 |
Rotate the longitude and latitude coordinates from their true geographical values into their values in a rotated coordinate system. The rotation can be done either for a single <lon/lat> point or for a complete trajectory file <inpfile>. In the latter case, a new trajectory <outfile> file with rotated longitude and latitude is written.
|
|
|
16 |
.SH PARAMETERS
|
|
|
17 |
.TP 15
|
|
|
18 |
.I inpfile
|
|
|
19 |
input trajectory file (with true lon/lat)
|
|
|
20 |
.TP 15
|
|
|
21 |
.I outfile
|
|
|
22 |
output trajectory file (with rotated lon/lat)
|
|
|
23 |
.TP 15
|
|
|
24 |
.I lon lat
|
|
|
25 |
true longitude and latitude
|
|
|
26 |
.SH OPTIONAL PARAMETERS
|
|
|
27 |
.TP 15
|
|
|
28 |
.I -lonlat pollon pollat
|
|
|
29 |
specify the coordinates (pollon, pollat) of the rotated north pole
|
|
|
30 |
.TP 15
|
|
|
31 |
.I -file filename
|
|
|
32 |
get the coordinates of the rotated north pole from the file <filename>. The file must be a netCDF file, either a constants or a P,S file.
|
|
|
33 |
.SH EXAMPLES
|
|
|
34 |
.TP 15
|
|
|
35 |
.B [1] geo2rot -lonlat -170 45
|
|
|
36 |
sets the rotated north pole to 170 W and 45 N. The new position is written to the file <geo2rot.pole>.
|
|
|
37 |
.TP 15
|
|
|
38 |
.B [2] geo2rot 45 50
|
|
|
39 |
takes coordinate (lon/lat)=(45/50) and rotates it to the rotated coordainte system. The position of the rotated pole is read from the file <geo2rot.pole>.
|
|
|
40 |
.TP 15
|
|
|
41 |
.B [3] geo2rot 45 50 -file eraint_cst
|
|
|
42 |
rotates (lon/lat) = (45/50) to the new system - the new pole position is read from the file <eraint_cst>.
|
|
|
43 |
.TP 15
|
|
|
44 |
.B [4] geo2rot trainp traout
|
|
|
45 |
read the trajectory file <trainp> and rotate all coordinates. The trajectory file with rotated coordinates is written to <traout>.
|
|
|
46 |
.TP 15
|
|
|
47 |
.B [5] geo2rot
|
|
|
48 |
write the pole position to screen.
|
|
|
49 |
.SH AUTHOR
|
|
|
50 |
Written by Michael Sprenger and Heini Wernli (July 2011)
|