1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
# Projection
This aims at editing the auto generated projections and the possible parameters related to it. The goal is not to explain what every option does, but rather allow users to find the right flags in CLI mode.
## General
The settings for the auto generated projections are saved in satdump_cfg.json
Beware that you need to edit /usr/share/satdump/satdump_cfg.json (with su) if you installed SatDump system-wide.
The settings for the different instruments and their composites can be found under:
```
"viewer": {
"instruments": {
...
}
}
```
This is an example how one instrument could be listed:
```
"viewer": {
"instruments": {
...
"avhrr_3": {
"handler": "image_handler",
"name": "AVHRR/3",
"rgb_composites": {
"221": {
"equation": "ch2, ch2, ch1",
"geo_correct": true,
"project": {
"width": 4096,
"height": 2048,
"old_algo": true,
"draw_map": true,
"equalize": true,
"config": {
"type": "equirectangular"
}
}
},
...
},
...
},
...
}
}
```
Each RGB composite can be individually projected. There are a few different possible projection types that can be selected:
- Equirectangular
- Mercator
- Stereo
- satellite (Tpers)
- Azimuthal Equidistant
There are a few general settings which all projection types have in common.
- `width` of the projected image
- `height` of the projected image
- `old_algo`: defines whether to use the old or the new projection algorithm
- `draw_map`: defines whether to draw a map overlay
- `equalize`: image brightness equalisation
- `config`: projection specific parameters
```
...
"project": {
"width": 4096,
"height": 2048,
"old_algo": false,
"draw_map": true,
"equalize": true,
"config": {
...
}
}
```
Depending on the type of projection, there are different parameters which you will need to frame your picture right.
The parameters must be added under `"config":`
## Equirectangular
For `equirectangular` projection, the following parameters are needed (else it will use default parameters):
- `tl_lon`: Top left corner longitude
- `tl_lat`: Top left corner latitude
- `br_lon`: Bottom right corner longitude
- `br_lat`: Bottom right corner latitude
Example:
```
...
"project": {
"width": 4096,
"height": 2048,
"old_algo": false,
"draw_map": true,
"equalize": true,
"config": {
"type": "equirectangular",
"tl_lon": -30.0,
"tl_lat": 80.0,
"br_lon": 40.0,
"br_lat": 30.0
}
}
```
## Mercator
There are no additional parameters required for this projection type.
Example:
```
...
"project": {
"width": 4096,
"height": 2048,
"old_algo": false,
"draw_map": true,
"equalize": true,
"config": {
"type": "mercator"
}
}
```
## Stereo
For `stereo` projection, the following parameters are needed (else it will use default parameters):
- `center_lon`: Center longitude
- `center_lat`: Center latitude
- `scale`: Scale
Example:
```
...
"project": {
"width": 4096,
"height": 4096,
"old_algo": false,
"draw_map": true,
"equalize": true,
"config": {
"type": "stereo",
"center_lon": 50.0,
"center_lat": 10.0,
"scale": 1.0
}
}
```
## Satellite (Tpers)
For `tpers` projection, the following parameters are needed (else it will use default parameters):
- `alt`: altitude
- `lon`: longitude
- `lat`: latitude
- `ang`: angle
- `azi`: azimuth
```
...
"project": {
"width": 4096,
"height": 4096,
"old_algo": false,
"draw_map": true,
"equalize": true,
"config": {
"type": "tpers",
"alt": 30000.0,
"lon": 10.0,
"lat": 50.0,
"ang": 0.0,
"azi": 0.0
}
}
```
## Azimuthal Equidistant
For `azeq` projection, the following parameters are needed (else it will use default parameters):
- `lon`: longitude
- `lat`: latitude
```
...
"project": {
"width": 4096,
"height": 4096,
"old_algo": false,
"draw_map": true,
"equalize": true,
"config": {
"type": "azeq",
"lon": 10.0,
"lat": 50.0,
}
}
```
|
