Equinox Systems GEMINI Manuel d'utilisateur télécharger pdf (Page 22)

Gemini Users Manual 17

Each item will be displayed for a few seconds before going to the next one. If you want

to change the currently displayed item, press one of the four direction buttons on the

Hand Controller. To skip to the next item without waiting, press the MENU button. If

you miss setting an item at this time, you can always use the “Setup” menu to make the

change after startup is complete (see chapter 5 for details on using the “Setup” menu).

2.4.2.1.1 Setting the UTC Date and Time

The current UTC date and time must be entered into Gemini so that it can make correct

calculations for pointing the telescope. If you choose to set the UTC date and time

during startup, first note the display, which will show the current value. The format for

the date and time is “yymm.dd hh:mm:ss” and must be in Coordinated Universal Time

(UTC) – not your local time. Enter each digit of the date and time using the direction

buttons on the Hand Controller as described in section 2.2.2 above. The currently

selected digit will blink. After selecting the seconds digit, press RA+. Gemini will then

return to the startup process and allow you to change the next item.

Note: Remember that the UTC date at certain times of the day may be one day ahead

of or behind your local date.

2.4.2.1.2 Setting your Mount Type/Parameters

The Gemini system supports several different mounts, and needs to know which one you

are using. Gemini will display the currently selected Mount Type. If you choose to

change this item, use the DEC buttons to scroll through the mount types available. When

your mount is displayed, press the RA+ button to select it. Gemini will then return to the

startup process and allow you to change the next item.

2.4.2.1.3 Setting Your Location

In order to accurately position your mount, Gemini needs to know your position on the

Earth in addition to the current date and time. If you had a GPS connected during power-

on, Gemini read this data and you can skip the next two steps. The GPS receiver can also

be read later using the menu item “Setup→Geogr. Location→Query GPS Rec.”

To set your geographic location manually during startup, press any direction button on

the Hand Controller when it displays either the Longitude or Latitude you wish to

change.

At the Longitude display, use the Hand Controller buttons to enter your Longitude as

previously noted. The longitude is counted from Greenwich, England; eastern longitudes

are designated by 'E', and western longitudes (including the American continent) by 'W'.

After you have entered the last digit, press the RA+ button again to set the longitude.

The display next shows “Latitude.” Press any direction button to initiate setting your

Latitude. Enter your Latitude using the RA and DEC buttons to change digits as you did

with Longitude. Northern latitudes are denoted by the “+” sign, while the “-” sign is used

for southern latitudes. After you have entered the last digit, press RA+ again to complete

the startup procedure.

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Equinox Systems GEMINI Manuel d'utilisateur Page 22