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» Online Classroom   »   » Public Discussion of Cel Nav   » Sight Analyzer in Starpilot 89

   
Author Topic: Sight Analyzer in Starpilot 89
Herman


 - posted December 28, 2016 02:12 PM      Profile for Herman           Edit/Delete Post 
Problem after using sight-analyzert the result gives WT one hour lower then the inputted sight times.
To be sure that there are no remaing errors in the system I complete uninstalled and reinstalled Starpilot on the TI-89.
2ND var-link
spuninst )
1,1, 0
2ND var-link
spsetup )
Settings
Date 20-12-2016
DR 51o 18' N 080 32' E
More Settings More Settings
ZD -1
WE 0
3. Sight reduction (I used 3 sights off Vega = Starno 49)
1: WT 17:53:24 Hs= 390 52'
2: WT 17:55:13 Hs= 390 34'
3: WT 17:56:38 Hs= 390 06'
IC=0 He=0
Sight Analyser
5. Course Speed
Speed DR Time 17:56:38
Course 0, Speed 0.
6.Analyze
DR 51.18 N 08.32 E
Shifted line
E voila unfortunate WT= 16:55:01 Hs 390 31,2
Control: I did the same excercise in Starpilot PC
That came with the correct time 17 hour.
So there is definitly something wrong in the displayed WT
in the Starpilot T_89 program
Strange that nobody has had this before?

From: Holland
Capt Steve Miller


 - posted December 28, 2016 06:46 PM      Profile for Capt Steve Miller           Edit/Delete Post 
- posted December 28, 2016 05:45 PM Profile for Capt Steve Miller Edit/Delete Post I have looked at your data and I have an observation: You indicate your Longitude is 80° 32' E and then indicate you ZD is -1. If the Longitude is correct then the ZD should be -5.

Using the data you supplied I got the following intercepts and ZNs
Sight #1 2068 miles @ 332.8°T
Sight #2 2057 miles @ 333.1°T
Sight #3 2035 miles @ 333.4°T

Then later I see the Longitude at 8° 32' E) if that is correct then the ZD would be -1.

Using the new position data (8° 32' E you supplied and using ZD -1 I got the following intercepts and ZNs
Sight #1 12.9 miles @ 285.5°T
Sight #2 11.4 miles @ 285.8°T
Sight #3 -3.8 miles @ 286.0°T

Please verify the data.

When I looked at the analysis I did not see any time indicated. Clicking on individual sights in the analysis the correct time, Hs, etc are there.

From: Starpath
Herman


 - posted December 29, 2016 04:54 AM      Profile for Herman           Edit/Delete Post 
Hello Steve,

The confusion about the longitude is because i think the degree sign has change to 0. But it must be 08 degr 32 min.
You are correct if you put the cursor on a sight TI-89 gives the WT time of that #sight. But if you put the cursor not on a #sight then push the enter button you get a screen with for instance the text:
[ENTER] to move line
[Esc] back to plot
WT/Hs' 016:55:01
039degr29.0min
And ther the time is one hour to low.

If have found one other strange value in TI-89 but
That is for one later post.
Regards HermanD

From: Holland
Capt Steve Miller


 - posted December 29, 2016 12:06 PM      Profile for Capt Steve Miller           Edit/Delete Post 
Hello,
I do see what you are talking about the time being 1 hour lower.
I will check this out further now that I see what you are talking about.

From: Starpath
Capt Steve Miller


 - posted December 29, 2016 12:35 PM      Profile for Capt Steve Miller           Edit/Delete Post 
It does appear that there is a bug in the StarPilot-89 program in this area.
I ran the sights using a ZD of +1 and I saw that in the Analysis page that the time to move to was one hour greater than the sight times.
I ran the sights again using ZD 0 and the Analysis page had the correct sight times.

Thus, as a possible work around use UTC for the times of the sights instead of your watch time. You would then be using ZD 0 and the time would not change on the Analysis page.

From: Starpath
Herman


 - posted December 29, 2016 01:30 PM      Profile for Herman           Edit/Delete Post 
Hello Steve,
I am glad that you agree there is a bug in the TI-89 program.
Only strange that no one has complained before about this.

When I have time I post the other problem in the TI-89 program.

Regards,
HermanD

From: Holland


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