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From: Andrés Ruiz
Date: 2017 Jun 30, 10:21 +0200
The discrepancy between the cross of the two LoPs obtained with a plastic sextant and the position, was more or less as in “201508 summer fix.png”, and it was in the summer of 2015.
Systematic Errors could be:
· In the observed altitude. (Here simulated)
· Uncertainty in deck-watch. (No)
· Inherent in the method by which the sight is worked. (Here, I gave enough data accuracy)
· In the reckoning between observations (Here SOG = 0)
And are the same for all LoPs .
Date | UT | Star | GHA | Dec | Ho |
20/02/1990 | 06:39:15 | Sirius | 148º 34.2' | 16º 42.2' S | 57º 58.6' |
20/02/1990 | 06:40:54 | Capella | 171º 10.3' | 45º 59.6' | 32º 28.1' |
20/02/1990 | 06:42:34 | Pollux | 134º 23.9' | 28º 3.1' | 30º 17.9' |
MSH intercept:
Z | p | p [nm] | |
Sirius | 103.4 | 0.3347 | 20.1 |
Capella | 8.4 | 0.5426 | 32.6 |
Pollux | 48.1 | 0.5228 | 31.4 |
The Fix is:
11º 06.1' S
178º 35.6' E
Distance( MSH solution, Fix ) = 22.3 nm
Any attempt?
regards,
