[time-nuts] Sources for Mission Time Clock

Bill Hawkins bill at iaxs.net
Sun Jan 11 12:12:26 EST 2015


It seems like the only cost-effective way to get that display is to
find a surplus source. If that's not possible, how about mounting a
flat panel computer monitor on the wall and driving it with some
custom software in a commercial computer with a standard operating
system. There are standard ways to handle NTP, IRIG-B, and 1 PPS.

Do you need to hold the countdown the way NASA does? Does the clock
provide the electrical signal to launch or deploy?

Bill Hawkins

-----Original Message-----
From: Martin A Flynn
Sent: Sunday, January 11, 2015 9:31 AM

I am looking for a GMT/GET mission time clock  that has the following

  * Reads T minus prior to launch or deployment,  T plus after.
  * Second display for GMT.
  * Simulating it on a PC display would be OK, would prefer an LED/LCD
    version for wall mounting

There is a example of what I am looking for in the background of this 
photo: https://www.hq.nasa.gov/alsj/a16/A16_116_13_15.jpg   .   We have 
NTP, IRIG-B, and a 1 PPS source to work with.

Any suggestions on a cost-effective way to accomplish this?

Martin Flynn

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