JUser: :_load: Unable to load user with ID: 1543
Saturday, 27 January 2007 22:56

January 28, 1986'”Remembrance of NASA Challenger astronauts

On the morning of January 28, 1986, a cold weather front was stuck over Georgia and the decision to launch STS 51-L was on the minds of NASA officials. The uncharacteristically cold morning at the Kennedy Space Center in Florida found temperatures around 31 degrees Fahrenheit (-0.5 degrees Celsius). From the book “Challenger: A Major Malfunction” by Macolm McConnell: “Challenger stood naked in its cone of spotlights, three miles across the black dunes.”

Twenty-one years ago, the Space Shuttle Challenger lifted off the launch pad at 11:38:00.010 a.m. EST (T = 0 seconds). During later investigations, a large puff of black-gray smoke was seen coming from the right-side solid rocket booster (SRB) at 0.678 second, 2.733 seconds, and 3.375 seconds into the flight.

The capsule communicator (CAPCOM) told the crew that they were “go at throttle up” at 68 seconds into the flight, and the Shuttle Commander responded with a “Roger, go at throttle up.”

At 73.162 seconds, Challenger began to break up at about 48,000 feet (14.6 kilometers) above the surface of the Earth. In the Mission Control Center (MCC) at the Johnson Space Center (Houston, Texas), an overhead black-and-white television monitor at Dynamics (DYN)—one of the backroom support positions for the Flight Dynamics Officer FDO)—showed an erratic plumb of smoke that, now, so eerily reminds people of that day: January 28, 1986.

At 73.628 seconds, the last of the telemetry data was transmitted from Challenger.

Around 89 seconds after liftoff, the Flight Director (FLIGHT), who coordinates the flight controllers, asked the FDO, who directs the shuttle’s flight path, for information. The FDO responded, “The filter has discreting sources”. Such a response told the Flight Director that the vehicle had broken up into many pieces.

The Ground Controller (GC), who coordinates the space flight tracking and data network, stated: “We have negative contact. Loss of downlink.”

Mostly numbing silence was felt throughout the MCC.

Seven people should be remembered from that day: Dick Scobee, Michael J. Smith, Ronald McNair, Ellison Onizuka, Judith Resnik, Gregory Jarvis, and Christa McAuliffe.

This reporter stood at the DYN console in front of the overhead black-and-white television monitor that January morning. It is good to recall failures so that successes will be more frequent and more gratifying in the future.

Any ambitious project as large and complicated as manned space exploration is bound to have failures. However, from the writings of Spanish-born American author George Santayana: “Those who cannot remember the past are condemned to repeat it.

As a follow-up, a good story authored by Richard Corfield about Apollo 1 and STS 51-L appears on The Washington Post Web site: https://www.washingtonpost.com/wp-dyn/content/article/2007/01/26/AR2007012601593.html.


Subscribe to ITWIRE UPDATE Newsletter here

Now’s the Time for 400G Migration

The optical fibre community is anxiously awaiting the benefits that 400G capacity per wavelength will bring to existing and future fibre optic networks.

Nearly every business wants to leverage the latest in digital offerings to remain competitive in their respective markets and to provide support for fast and ever-increasing demands for data capacity. 400G is the answer.

Initial challenges are associated with supporting such project and upgrades to fulfil the promise of higher-capacity transport.

The foundation of optical networking infrastructure includes coherent optical transceivers and digital signal processing (DSP), mux/demux, ROADM, and optical amplifiers, all of which must be able to support 400G capacity.

With today’s proprietary power-hungry and high cost transceivers and DSP, how is migration to 400G networks going to be a viable option?

PacketLight's next-generation standardised solutions may be the answer. Click below to read the full article.


WEBINAR PROMOTION ON ITWIRE: It's all about webinars

These days our customers Advertising & Marketing campaigns are mainly focussed on webinars.

If you wish to promote a Webinar we recommend at least a 2 week campaign prior to your event.

The iTWire campaign will include extensive adverts on our News Site itwire.com and prominent Newsletter promotion https://www.itwire.com/itwire-update.html and Promotional News & Editorial.

This coupled with the new capabilities 5G brings opens up huge opportunities for both network operators and enterprise organisations.

We have a Webinar Business Booster Pack and other supportive programs.

We look forward to discussing your campaign goals with you.



Share News tips for the iTWire Journalists? Your tip will be anonymous




Guest Opinion

Guest Interviews

Guest Reviews

Guest Research

Guest Research & Case Studies

Channel News