Mitsubishi Gpredict 1.2, Руководство пользователя

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Gpredict User Manual
Format String Resulting Time String
%Y/%m/%d %H:%M:%S 2006/07/23 21:22:00
%Y.%j %H:%M:%S 2006.204 21:22:00
%b %d, %Hh%M Jul 23, 21h26
Table 3.3: Examples of time format strings.
3.2.3 Geographical Coordinates
Geographical coordinates in gpredict (e.g. ground station location and sub-
satellite points) are specified using decimal degrees North for latitude and
decimal degrees East for longitude. This means that longitudes West of
Greenwich are negative, as are latitudes South of the Equator. To avoid any
endless discussions on whether this is the correct convention or not,
gpredict offers you the possibility to show geographical coordinates using
N, S, E and W suffixes instead of signs. You can enable this by checking the
Use N/S/E/W for geographical coordinates field. Enabling this will show
12.34° East of Greenwich as 12.34°E, while 12.34° West of Greenwich will
be shown as 12.34°W.
3.2.4 Measurement Units
This option allows you to choose imperial units instead of the metric
system, i.e. miles instead of km and feet instead of meters. Internally,
gpredict will always use the metric system and this setting will only affect
how the data is presented.
3.3 Ground Stations
This page allows you to add, edit and delete ground stations. You can
define as many ground stations as you want, but you need at least one. You
can always choose between the pre-defined ground stations when you
create or configure a module. Figure 3.2 shows how the corresponding
configuration page looks like in the preferences dialogue.
The page shows the existing ground stations in a table. For each entry, the
table shows the name, latitude, longitude, altitude, weather station, and
whether the ground station is the default one or not
1 . The table also shows
a column called QRA. This is the Maidenhead locator square corresponding
to the specified location. Gpredict does not store the Maidenhead locator
info, instead it calculates it automatically from the latitude and longitude.
Below the table there are three buttons, namely
Add New , Edit , and
Delete . As their names suggest, these buttons are there for adding, editing
and for deleting entries in the table.
1 Default ground station has no particular meaning in gpredict, except that this
location will be used when no explicit selection is made for a module or
prediction function
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