OSKER User Manual Version 3.0
7
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 transce
ivers’ 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 device, as opposed to emails forwarded by
XeosOnline. An e
xample of a “raw” Iridium mes
sage via email is below and will always have the
IMEI of the device in the subject line, regardless of its name on XeosOnline.
F
IGURE
2:
A
N EXAMPLE OF A RAW
I
RIDIUM MESSAGE FROM A DEVICE VIA EMAIL
All messages from Iridium devices come from this address.
MOMSN: 5866
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.
MTMSN: 0
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.
Time of Session (UTC)
The time the message arrived at the Iridium Gateway
