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Understanding Position Information
There are two types of position information which will be sent via the Iridium Gateway.
Iridium Doppler position
The Iridium Gateway calculates the Iridium transceivers' position on earth when it receives a
transmission, using Doppler technology. As a result, it is often very inaccurate. This location is
only visible to users getting emails directly from the Rover, as opposed to emails forwarded by
Xeos Online. An example of a "raw" Iridium message via email is below and will always have the
IMEI of the device in the subject line, regardless of its name on XeosOnline.
sbdservice@sbd.iridium.com
MOMSN: 5866
MTMSN: 0
Time of Session (UTC)
Session Status
Rover User Manual Version 3.0
All messages from Iridium devices come from this address.
Mobile Originating Message Serial Number; each individual
message has its own incrementing serial number. A mobile
originating message is one that comes from the Iridium
device.
Mobile Terminating Message Serial Number; like the MOMSN,
messages to Iridium devices (like commands) also have an
incrementing serial number. Since the message in the
example is from an Iridium device, the MT number is zero.
The time the message arrived at the Iridium Gateway
Each message will have a code determined by how well the
message was received; codes 00, 01 and 02 are acceptable
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