RC3000 Antenna Controller Appendix TLE Two Line Element Tracking
TLE-9
3.3.1.1.3 Preset Satellites
In addition to the normal data associated with a preset satellite, an additional field is provided to signal
whether or not there is TLE data available for the satellite. If there is TLE data available, the preset
number will be used as the index to the ephemeris data described in 3.3.1.1.4.
SAT#: 3 CONFIG-SATS
NAME:BRASIL A1 LON: 79.0W
INCLIN: 2 BAND:0 EPHEM:1
EPHEMERIS DATA <0>NONE <1>TLE
EPHEM EPHEMERIS DATA <0>NONE <1>TLE
This field signals whether there is TLE data available for the preset satellite.
3.3.1.1.4 Two Line Element Set Data
As the name implies, Two Line Element set data is described by two lines of data each with 69
characters. The RC3000 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 1 data:
SAT#: 3 SAT K2 CONFIG-TLE1
1 16276U 85109D 01089.41658071
-.00000230 00000-0 10000-3 0 862
<SCR> THRU LIST, <ENTER> TO MODIFY DATA
Example line 2 data:
SAT#: 3 SAT K2 CONFIG-TLE2
2 16276U 3.6693 80.7624 0003295
214.0161 248.7192 1.00272265 36335
<0-9 . SCR UP+/DN- ENTER( ) BKSP> COL: 1
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 RC3000 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.
The COL: field will show the present column number of the cursor.
After entering the 69th character the RC3000 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.
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