700- LT1-Man Rev 8 09 Feb 2021
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A scheduled message will always be transmitted in accordance with the programmed
schedule. If there is a conflict, Random transmissions will be sent immediately after the
scheduled transmission.
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Random transmissions have a maximum message size of 77 bytes. Data which exceeds this
limit will be truncated.
To set up a Random Transmission, first input the transmission channel on the Station GOES page
(see Figure 8-3). In order to send random transmissions, random channel parameters must be
provided by NOAA/ EUMETSAT.
Retries:
Random Transmissions can be re-sent in subsequent transmission windows for up to a
maximum of 5 transmissions. Each Repeat Count transmission will be identical to the preceding
one. After the last repeat count transmission, the next message will be updated with the latest
variable data and then this information will be sent in accordance with the assigned Repeat Count.
The default setting is one (1) which means the message will only be sent twice (the original and one
repeat).
NOTE: If using a 5 minute sample rate for an alert variable, the number of retries
should not exceed one (1) to prevent a data backlog.
5.4.4
CREATING ALERT CONDITIONS
After setting up the random message transmission parameters, select the “Configure Message
Transmission” button and then select the “Add an Alert Condition” option.
1)
Define the condition using the drop-down
menus
2)
Add the fields which include the data you want
transmitted.
3)
Save Message.
4)
Confirm message format using the Show
Configured Message button.
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