×
INDI Library v1.8.1 Released (09 Sep 2019)

Monthly maintenance release INDI v1.8.1

how critical location coordinates are?

6 months 1 week ago 6 months 1 week ago by maxthebuilder.
maxthebuilder
Gold Boarder
Gold Boarder
Posts: 227
More
Topic Author
how critical location coordinates are? #37508
Hello,
I am going to travel/camping not very far from home - about 80mi/130km away.
Do I need to update the location coordinates in KStars? What's the tolerance there?
(I don't have a GPS dongle).
Thanks!

Max S.
RPI 3 B+ and RPI 4 B (4Gb) with Stellarmate OS.
Nikon D5300. Nikon D5500 H-a modified. 180 mm f/2.8 antique Nikon. Tamron AF 28-75mm f/2.8.
AT72EDII refractor. ZWO ASI294MC Pro
ZWO ASI120MC-S on ZWO 30F4 MiniScope.
SW AZ-GTi mount in EQ mode.
iOptron SkyTracker Pro.

Please Log in or Create an account to join the conversation.

6 months 1 week ago
Gonzothegreat
Administrator
Administrator
Posts: 1632
Karma: 6
More
how critical location coordinates are? #37512
The following link might hold the answer
stellarmate.com/support.html?view=kb&kbartid=6

Time and Location settings are critical to the proper operation of StellarMate. This is even more apparent if you're on the go with a mobile setup. For a fixed-observatory, the only factor you have to worry about synchronizing is time. On the otherhand, a mobile setup requires both location and time settings to be accurate.

The time & location settings are not only used for KStars, but also to synchrnoize the mount and any other devices with time & location dependencies. For example, some weather drivers depend on location to query and retrieve information about the current weather.


Kstars Mac osx
Odroid C1 running indiserver (kept up-to-date with apt-get update/upgrade)
HEQ5 pro / QHY5 / Atik 314L+

Please Log in or Create an account to join the conversation.

6 months 1 week ago 6 months 1 week ago by maxthebuilder.
maxthebuilder
Gold Boarder
Gold Boarder
Posts: 227
More
Topic Author
how critical location coordinates are? #37531
I do realize that it's important....
But my question was (I should've emphasized it more clearly) - what is the tolerance there?
Is it OK to move 1km away without updating? 2km? 10?
2 digits after decimal point is enough? 3?

Thanks!

Max S.
RPI 3 B+ and RPI 4 B (4Gb) with Stellarmate OS.
Nikon D5300. Nikon D5500 H-a modified. 180 mm f/2.8 antique Nikon. Tamron AF 28-75mm f/2.8.
AT72EDII refractor. ZWO ASI294MC Pro
ZWO ASI120MC-S on ZWO 30F4 MiniScope.
SW AZ-GTi mount in EQ mode.
iOptron SkyTracker Pro.

Please Log in or Create an account to join the conversation.

6 months 6 days ago
Ihoujin
Platinum Boarder
Platinum Boarder
Posts: 658
Karma: 3
More
how critical location coordinates are? #37538
Is best to be accurate. It will affect your pointing accuracy.
If you know where you will be, why not prepare a new custom location in the set geography window?

If you do, you will also be able to see how much the sky differs by switching back and forth.

INDI/KStars on Raspberry Pi 3B+
Lubuntu 16.04
Skywatcher HEQ5 Pro Mount
Canon 600D Camera
Orion SSAG @280mm Guide Scope
PHD2
Adafruit Motor Hat shield
Adafruit GPS Module
Generic Bluetooth Joystick.
Startech 7 port powered USB Hub.

Please Log in or Create an account to join the conversation.

6 months 6 days ago 6 months 6 days ago by maxthebuilder.
maxthebuilder
Gold Boarder
Gold Boarder
Posts: 227
More
Topic Author
how critical location coordinates are? #37544
: ) I do realize that it's best to be accurate...
Still, it would be interesting to know what the consequences are if I am, say, 1-50 km off...
I am not talking about 1000 km which would, I guess, make a huge difference.
OK. I'll experiment myself.
Thanks!

Max S.
RPI 3 B+ and RPI 4 B (4Gb) with Stellarmate OS.
Nikon D5300. Nikon D5500 H-a modified. 180 mm f/2.8 antique Nikon. Tamron AF 28-75mm f/2.8.
AT72EDII refractor. ZWO ASI294MC Pro
ZWO ASI120MC-S on ZWO 30F4 MiniScope.
SW AZ-GTi mount in EQ mode.
iOptron SkyTracker Pro.

Please Log in or Create an account to join the conversation.

6 months 6 days ago
pch
Expert Boarder
Expert Boarder
Posts: 159
Karma: 2
More
how critical location coordinates are? #37548
All depend what you do with your telescope.
To measure asteroid position for example the require tolerance is just a few meters.

But if it's to make nice pictures some kilometers do not make a difference.
The limit may be the hour angle computation, this can make the mount meridian flip wrong, or trying to slew to an object below the horizon.
111 km make a difference of one degree, take this as the limit.

The following user(s) said Thank You maxthebuilder

Please Log in or Create an account to join the conversation.

6 months 6 days ago
maxthebuilder
Gold Boarder
Gold Boarder
Posts: 227
More
Topic Author
how critical location coordinates are? #37571
Great info - thanks!

pch wrote: All depend what you do with your telescope.
...
But if it's to make nice pictures some kilometers do not make a difference.
The limit may be the hour angle computation, this can make the mount meridian flip wrong, or trying to slew to an object below the horizon.
111 km make a difference of one degree, take this as the limit.


Max S.
RPI 3 B+ and RPI 4 B (4Gb) with Stellarmate OS.
Nikon D5300. Nikon D5500 H-a modified. 180 mm f/2.8 antique Nikon. Tamron AF 28-75mm f/2.8.
AT72EDII refractor. ZWO ASI294MC Pro
ZWO ASI120MC-S on ZWO 30F4 MiniScope.
SW AZ-GTi mount in EQ mode.
iOptron SkyTracker Pro.

Please Log in or Create an account to join the conversation.

Time to create page: 0.298 seconds