Tag Archives: UTC

Finals Week

29 Friday Jan 2016

Posted by in Earth Space Exploration Program, Mars, Mars 2016, Mars calendar, Science Fiction, Space, Space, Virtual Adventures

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  • Mars Date/Time:  Year 1, Sur One, Thursday, Sol 26 (1.1.26)  2:59 PM NST
  • Earth Date/Time:  Friday, 29 January 2016  2:00 PM PST

Today the crew is finished testing on the systems on ESS Queen Elizabeth II and the ESS Carl Sagan. As the crew is currently on board the QE II, a crew of spaceport astronauts filled in for the testing on the Sagan.

A mishap did occur during Thursday’s test of the Sagan’s Impulse Cycle Propulsion (ICP) pellet propulsion. An astronaut broke his leg when a pellet moved into position for firing. The situation was investigated and it was determined that the astronaut had not notified the Pilot on QE II that he was in the loader area. New requirements were instituted to require video monitoring of the propulsion section by at least two crew members during any use of the propulsion drive on either ship.

Sagan ICP Gun Section near where an astronaut broke his leg this week

Sagan ICP Gun Section near where an astronaut broke his leg this week

With the exception of Thursday’s accident this week’s testing has gone well. The crew has run simulated test firings of the propulsion systems of both ships without actually launching a pellet or detonating it. All other systems are ready for the orbital transfer to Mars.

The next few weeks the crew will be loading in final supplies, running drills, and preparing to leave Earth for a minimum of 21 months. The crew is ahead of schedule and tomorrow will be light duty before Monday’s commissioning of both ships.

Also, tomorrow the entire program switches over to Mars time. This date was selected to give the crew adequate time to adjust before orbital transfer and it will have minimal impact on the crew. At 12:00 PM PST the clocks will convert to 12:21 PM NST.

A Matter of Time

09 Saturday Jan 2016

Posted by in Mars, Mars 2016, Science Fiction, Space, Space, Virtual Adventures

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Date: Year 1, Sur One, Sol 6 (1.1.6)

If you understand the reason humans created time zones on Earth, you will understand that we have the same need on Mars. On Mars, time zones are divided into 15° segments of longitude.

Time Zones on Earth for the Americas

Time Zones on Earth for the Americas

On Earth, the beginning point of all time zones is in Greenwich, England. It was referred to as Greenwich Mean Time (GMT) but is now replaced by Coordinated Universal Time (UTC). Every time zone on Earth is determined by how many time zones or hours it is from Greenwich. For example, Pacific Standard Time (PST) is currently eight hours behind UTC, so it is referred to as UTC -8.

Mars has been given a similar zone zero, like Earth’s UTC zone. It is located at the Airy Crater and that zone is known as Mars Coordinated Time (MTC). Our primary landing site on Mars is the Noctis Labyrinthus which is seven hours behind the Airy Crater or MTC -7.

As I am writing this post, it is 6:11 PM (18:11) PST, 8 January, 2016, on Earth. The time at our primary landing site on Mars is 8:33 AM (08:33) at what we are calling Noctis Standard Time (NST). The date is 6 Sur One, meaning it is the 6th day of the first month of Sur winter.

However, a day on Mars, (the time it takes the planet to make one revolution,) is 2.7% longer than an Earth day (about 40 minutes longer.) This means that at 6:11 PM PST tomorrow, it will NOT be 8:33 NST on Mars. In fact it will be 7:53 NST. To keep Mars on a 24 hour day scientists have devised a time system for Mars by making each second 2.7% longer than an Earth second.

If you are an astronaut on Mars, this is not an issue; however, if you’re a Mars scientist on Earth then you will experience a Mars ‘time creep’ where each Mars day pushes your Earth schedule 40 minutes forward each day.

As more of Mars becomes occupied by humans the time and day length differences will seem more commonplace; however, it can be confusing when someone says it will take 110 days to reach Mars because you have to know if that is Earth days, or Mars days.