RESEARCH CONCEPTS RC4500 - TLE 2 Data

RC4500 Antenna Controller Chapter 5 MODES – In Depth Descriptions
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*** NOTE: The TLE screen will only be available on RC4500 controllers that were purchased with the
Ephemeris TLE option. ***
5.2.1.1.3 TLE 2 Data
As the name implies, Two Line Element set data is described by two lines of data each with 69 characters.
The RC4500 uses one screen to show each line of data. The top line of each screen identifies which line
is being displayed (TLE1 or TLE2). The top line will also show the index number and satellite name from
the preset satellite screen. The user may scroll through index numbers via the SCROLL UP or SCROLL
DN keys.
When a TLE data screen is initialized it shows the existing TLE data stored.
Example line 2 data:
SAT#:3 SAT K2 CONFIG-TLE2
2 16276 3.6693 80.7624 0003295
214.0161 248.7192 1.00272265 36335
<SCR>THRU LIST, <ENTER>MODIFY DATA
After scrolling to the desired index, the user may begin to edit data by pressing the ENTER key. The
cursor will then be placed on the first data character for the line. This character will be “1” for the first line
and “2” for the second line. NOTE: see the tables that follow this section for further description of the data
contained in each line.
Data may be entered in an overwrite type of editing style. After a character is keyed, the cursor will
advance to the next character. The cursor may be moved backwards by the BKSP key. To enter data,
the 0 through 9 numbers, the “.” are available directly from the RC4000 keypad. To enter a “+” use the
SCROLL UP key and to enter a “-“ use the SCROLL DN key. Pressing the ENTER key will record a
space and advance the cursor.
Space “ ” characters and alphabetic characters are not entered by the user (the display shows blank
spaces where these characters would normally exist in the TLE data sets.)
After entering the 69th character the RC4000 will calculate the data's checksum and compare it to the last
character. If the calculated and entered checksums don't match, an error will be flagged.
If a satellite has not been SETUP (
5.1.2.1) with TLE data and initialized, then it will not be available from
the TLE2 CONFIG screen. If no satellites with TLE data have been SETUP, then the following screen will
be displayed.
CONFIG-TLE2
* NO SATELLITES IN MEMORY *
<MODE>EXIT