[time-nuts] Aircraft ping timing
nuts at lazygranch.com
Fri Mar 21 23:52:29 EDT 2014
On Thu, 20 Mar 2014 14:42:42 -0400
Joe Leikhim <jleikhim at leikhim.com> wrote:
> I just red somewhere that the last "ping" was the only one recorded
> by Inmarsat system, Pings up to that point were presumed to occur due
> to known reporting intervals. So there is no "track".
> The Inmarsat data is a red herring. The plane could have ditched into
> the water 85 minutes after the "incident:, at location near last
> radar contact and floated with Inmarsat operating on service battery
> for hours.
> The ELT's used in this aircraft have been implicated in two fires due
> to shorted lithium battery wires. There was an AD/Recall issued. No
> reports whatsoever about the ELT being activated, so if it
> burned...... Good only for 48 hours or so anyway if looking in the
> wrong place.
> Maybe there is a market for Orbcomm asset tracking transmitters
> mounted way up in an inaccessible location of the tail with own back
> up battery supply.
Orbcomm is kind of troublesome.
There is a tracking service used mostly by helicopters, which of course
are notorious for falling off the radar due to low altitude. It is
I've used or have know users various satellite messaging services over
the years. Iridium is good. I was a Globcomm customer, but it was not
reliable. A friend was on Orbcomm and it had issues as well.
More information about the time-nuts