Editing SAR Fundamentals/Navigation/Map/Triangulation/Samples
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<pre> | <pre> | ||
+ | Material Covered: | ||
+ | * triangulation | ||
+ | |||
+ | Prerequisites: | ||
+ | |||
+ | |||
+ | Objective: | ||
+ | Students w | ||
+ | |||
+ | Duration: 45 minutes | ||
+ | |||
+ | Aids: | ||
+ | |||
+ | Plan: | ||
+ | |||
+ | |||
+ | |||
LE = local east | LE = local east | ||
LN = local north | LN = local north | ||
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LN = (- tan(R2B)*R2N + R2E + tan(R1B)*R1N - R1E)/(tan(R1B) - tan(R2B)) | LN = (- tan(R2B)*R2N + R2E + tan(R1B)*R1N - R1E)/(tan(R1B) - tan(R2B)) | ||
LN = (tan(R1B)*R1N - tan(R2B)*R2N + R2E - R1E)/(tan(R1B) - tan(R2B)) | LN = (tan(R1B)*R1N - tan(R2B)*R2N + R2E - R1E)/(tan(R1B) - tan(R2B)) | ||
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On a line with a bearing to a remote point | On a line with a bearing to a remote point | ||
Line,RemoteUTM,TNBearingToRemote,LocalUTM | Line,RemoteUTM,TNBearingToRemote,LocalUTM | ||
Line 55: | Line 70: | ||
915786 70 866784 296 887775 | 915786 70 866784 296 887775 | ||
915786 60 866784 304 889770 !!890768 | 915786 60 866784 304 889770 !!890768 | ||
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- | * Can generate more samples, but make sure points are visible on the map. | + | * Can generate more samples, |
- | + | but make sure points are visible on the map. | |
wuth@errant$ utm-triangulate 915786 70 866784 295 2 5 | wuth@errant$ utm-triangulate 915786 70 866784 295 2 5 | ||
888775 | 888775 | ||
wuth@errant$ | wuth@errant$ | ||
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Line 70: | Line 84: | ||
answer. | answer. | ||
- | + | ||
Accuracy Sources of Error: | Accuracy Sources of Error: | ||
UTM rounding: | UTM rounding: | ||
Line 109: | Line 123: | ||
5 degree error in 1km is 87m left/right | 5 degree error in 1km is 87m left/right | ||
10 degree error in 1km is 176m left/right | 10 degree error in 1km is 176m left/right | ||
+ | |||
</pre> | </pre> |