HELP: Time Formats/Units Help
The formats and units screen allows the user to customize
the units used for input and the appearance of the output.
Following are descriptions of each option:
Date/Time
When time is displayed or requested it consists of the date
followed by the time of day (Greenwich). The following options
are available for output:
Date
yyyy ddd - four digit year followed by a 3 digit day in the
range of 1 to 366.
yy/mm/dd - 2 digit year followed by the 2 digit month (01-12)
and the day of the month (1-31).
yy-Mmm-dd
yy-MMM-dd - 2 digit year followed by the 3 character month
(Jan, Feb,...) and the 2 digit day (01-31).
These two options refer to the month displayed
with the first letter capitalized (Jan, Feb, ...)
or the month displayed in all capital letters
(JAN, FEB, ...).
Time
hh.hhhhh - Decimal hours with five (5) decimal places.
Five places is sufficient to display with
resolution of one (1) second.
hh:mm:ss - Hours, minutes, and seconds separated by colons.
hh:mm - Hours and minutes. The purpose of this option
is to save space when seconds are not necessary.
Please note that all of the above are valid for input regardless
of the selection. Select HELP for entering time for more details.
Distance
The options for distance affect input and output. For input the
units determine the units to be entered when a cartesian coordinate
or radius is to be entered. The options are as follows:
EarthRadii (RE) - The units are based upon the radius of the
earth or units of 6378.16 km.
Megameters (Mm) - Megameters or 1000 km.
Kilometers (km) - Kilometers with up to 7 digits and a sign
before the decimal point.
Integer (km) - Kilometers displayed as an integer. The
purpose of this option is to save space by not
supplying a decimal place or excessive precision.
Sci Notation (km) - Kilometers displayed in scientific notation.
For example, 12020 kilometers would be displayed
as 1.2020E+04.
Following these choices is the option of requesting the number
of decimal places to be displayed. This option is not used for
Integer (km) nor is it used for input. The number of places
must be between 1 and 6 inclusive.
Degrees (Latitude and Longitude)
This options for displaying degrees involve units and the sign.
For units the following options are available:
-dd.dddd - Decimal degrees. The latitude and longitude are
displayed in decimal notation. The number of decimal
places must be specified and between 1 and 6 inclusive.
-dd dd'dd" - Degrees, minutes, and seconds. The latitude
and longitude are displayed as integers in degrees,
followed by minutes and seconds.
-dd dd' - Degrees and minutes. This is identical to degrees,
minutes and seconds except seconds are omitted.
Direction/Range
This option allows the user to determin whether to display a signed
number for degrees or the direction following the number. Also,
the longitude can be displayed in the range of -180 to 180 or 0 to
360. Following is a description of each option:
Lat (-90,+90), Long (0,360) - Latitude is displayed in the
range of -90 to 90 and longitude is displayed in the
range of 0 to 360. The sign (-) is displayed only
for latitudes in the southern hemisphere.
Lat (-90,+90), Long (-180,+180) - Latitude is displayed in the
range of -90 to 90 and longitude is displayed in the
range of -180 to 180. The sign (-) is displayed only for
latitudes in the southern hemisphere and longitudes
in the western hemisphere.
Lat (90s,90n), Long (180w,180e) - Latitude and Longitude are
displayed followed by the direction (e,w,n,s) instead of
being preceded by a sign.