and log in with user name 'service', password 'service'. Then upload the TLE.TXT file to the
default directory on the ACU. You may be asked to confirm if the existing TLE.TXT file shall be
overwritten.
Step 3: reload the TLE.TXT file in the ACU software
For this last step open the
Orbital Data Editor
page from the navigation bar and ensure that the
page shows the TLE ephemerides list (The heading 'Two Line Elements' is shown at the top left).
Now click to the 're-read the TLE.TXT file' link at the bottom of the page.
The TLE data is now imported from the TLE.TXT file, replacing all TLE ephemerides previously
stored on the ACU.
If you click to a I11 dataset number at the
Orbital Data Editor
page, the ACU opens the
I11
Dataset Editor
page for this particular dataset. The editor shows the I11 data as a form with
multiple fields where each parameter can be edited. A number of buttons are provided to tell the
ACU what to do with the edited dataset.
The buttons at the bottom of the I11 dataset editor page let you either save the edited values,
save the edited values to another memory location or you may leave the editor without saving the
changes.
CANCEL --- This abadons the editing process, leaves the stored values unchanged. You are
returned to the orbital data selection page
SAVE --- This saves the edited values and returns to the orbital data selection page. If the
ACU actually uses the I11 dataset with this number for tracking, the new dataset will be used
with the next tracking cycle.
SAVETO --- This saves the edited values to the memory location set at the entry field right
beside the button. The value in this field is preset with the I11 memory number for which the
editor has been opened. It has to be changed if the editor shall save the edited I11 data to
another location. If the ACU actually uses the I11 dataset with this number for tracking, the
new dataset will be used with the next tracking cycle.
All three buttons work immediately when clicked, there is no 'do you really want' query before the
clicked action is executed. To delete a dataset, clear the 'name' input field and save the dataset,
its content will be cleared.
170 Hour Prediction Values Check
The I11 ephemerides contain the predicted satellite at 170 hours after the epoch of the data set.
The I11 dataset editor uses this predicted position to verify if the ephemirdes data has been
entered correctly. When the a data set has been saved ('SAVE' or 'SAVE TO'), the ACU calulates
the satellite position for 170 hours after the epoch and compares the calulated positionto the
predicted values in the data set. If they differ more than 0.005??, a warning is displayed with
both, the calculated and the predicted angles.
The edited dataset is saved even with this warning displayed, but you should re-edit it and check
if all values have been entered correctly.
I11 Dataset Editor Page Example:
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