21 May
2019
21 May
'19
9:53 a.m.
pritty much lol
On Tue, May 21, 2019 at 9:50 AM Jon Elson via cctalk <cctalk at classiccmp.org>
wrote:
On 05/20/2019 05:38 PM, Carl Claunch via cctalk
wrote:
On 05/19/2019 09:46 AM, Jon Elson via cctalk
wrote:
one
There's a switch labeled "IRIG"
which stands for Inter Range
Instrumentation Group, and refers to a standard for
telemetry encoding. There is a standard for time code, a
standard for modulating analog signas onto a bunch of FM
carriers, and a standard for multiplexing several analog
signals onto one FM carrier.
In this case IRIG stands for Inertial Reference
Integrating Gyroscope, of three inside the Intertial Measurement Unit of
the spacecraft.
Good GRIEF! Clashing acronyms. And, NASA certainly knew
about the other IRIG, as they used IRIG standards on a lot
of telemetry and radar systems.
Jon