Generator Trippings-Simulation

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We have generating units where the existing T90GS 4.2 MW machine will be operated in parallel with new SG-400 machine (11-13 MW) at rated load.. If the SG-400 trips while operating in parallel with existing T90GS 4.2 MW machine, then running plant load will be absorbed by the existing T90GS machine

NASA Scientists Monitor Ocean Temperatures to Understand Weather

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The enhanced sea surface temperature product image depicts the new coverage area and is provided to weather offices to improve forecastsEarth's oceans and atmosphere are engaged in a complex dance, continually exchanging heat and moisture. Ocean conditions directly influence the conditions of the atmosphere. To predict our weather, forecasters need the best information they can get about the state of affairs in the sea. That's where the Short-term Prediction Research and Transition, or SPoRT, project at the Marshall Space Flight Center steps in. The SPoRT team uses NASA Earth observation satellite sensors to provide ocean temperature updates to the National Weather Service four times daily. The SPoRT scientists recently enhanced their ability to detect changes in sea surface temperatures -- a variable that greatly affects weather in coastal regions -- and the public will benefit.

The SPoRT project is expanding its reach too. The previous sea surface temperature product covered the Gulf of Mexico and the southern and eastern coastlines of the U.S. The new coverage region will include all of the ocean areas surrounding North America, from the Hawaiian Islands to the middle of the Atlantic, and from Hudson's Bay and the Gulf of Alaska to the equator, including the tropical oceans where hurricanes form.

"Our enhanced sea surface temperature product brings in more data, allowing more up-to-date and accurate inputs into weather forecasts," explains Dr. Gary Jedlovec, satellite meteorologist and SPoRT principal investigator. "We're also expanding the coverage area, benefiting more communities along the coastal regions."

"Much of the energy for weather systems comes from the ocean," adds Frank LaFontaine, a SPoRT meteorologist. "That's why the sea surface temperature is so critical to forecasters. Many storm systems like to form and/or intensify over warm water, where there's a lot of potential energy for them to tap."

LaFontaine says that the new product will help even help researchers detect thermal currents and eddies, which are important because clouds tend to form along those lines.

"For instance, tropical depressions often start forming out at sea and strengthen over the warm tropical waters," explains LaFontaine. "Variations in sea surface temperatures in coastal regions can further strengthen or weaken the storm as it makes landfall."

The SPoRT team says the data provided by their new product could help forecasters predict how intense hurricanes or tropical storms will be.

"A hurricane can ramp up offshore in intensity level so quickly, there's not enough time to warn the public," says LaFontaine. "Our product could help with predicting that intensity surge."

The enhanced product achieves its improved level of detail by adding microwave readings from the Advanced Microwave Scanning Radiometer, or AMSR, a sensor aboard NASA's Aqua satellite, to the data already in use by the previous version of the SPoRT product. That version incorporated only infrared data from the MODerate-resolution Infrared Spectrometer, also known as MODIS, aboard the Aqua and Terra satellites. The microwave data complements the infrared data in an important way.

"Microwaves can penetrate the clouds, allowing us to take data over both clear and cloudy areas," says Jedlovec. "The old version of our product left gaps where the clouds were."

The data allows the scientists to resolve small changes in the temperatures at the ocean's surface at 1-kilometer, or 0.62 mile, intervals. To put it simply, if the water temperature varies 0.2 degrees Celsius, or 0.36 Fahrenheit, between a 1 kilometer square area and the next, they can detect that difference. This level of detail improves the models used to predict weather.

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Hubble Celebrates 20 Years of Astonishing Discoveries

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Hubble collage of sections of Carina Nebula
Space shuttle Discovery roared into orbit April 24, 1990, with a most precious cargo, NASA's Hubble Space Telescope. In the two decades since, teams of astronauts working from other shuttles repaired the orbiting eye on the universe and extended its abilities far beyond what was thought possible for longer than many thought realistic.

Hubble, named for groundbreaking astronomer Edwin Hubble, repaid the commitment with some of the most dazzling images the world has seen, along with fresh data that answered a wealth of questions and led to many new ones. The telescope's observations allowed astronomers to set the age of the universe at about 13.7 billion years with a high degree of certainty.

"I never believed in 1990 that the Hubble would end up this great," said Ed Weiler, NASA associate administrator for the Science Mission Directorate and chief scientist for the Hubble program when it launched. "It's changed a lot of thinking and it's changed a lot of what I learned 30 years ago in grad school."

Hubble's discoveries stretch over most aspects of astronomy, but its highlights include proving massive black holes exist and defining the age of the universe. It also proved the existence of something no one has seen -- dark energy.

"Nobody ever knew it existed before Hubble," said Jon Grunsfeld, an astronaut and astronomer who worked on Hubble during two shuttle missions.

The telescope's most unique element, though, is its orbit -- a perch so high above the planet that its pictures are not warped or distorted by the air currents, moisture and other effects from Earth's atmosphere.

"It's that extreme clarity that gives us the feeling we've traveled out into space to see these objects," Grunsfeld said. "It really is our time machine."

From more than 300 miles in space, Hubble looked back in time, showing astronomers what embryonic galaxies looked like almost 14 billion years ago. In some cases, Hubble's instruments picked up light that left stars only 600 million years after the Big Bang. "We're seeing the universe as it was perhaps as a toddler," Grunsfeld said.

An image that is perhaps Hubble's most famous, known as the Hubble Deep Field, was made when the telescope was pointed at a small sliver of space in the constellation Ursa Major, which appeared black and empty. Hubble found it brimming with young galaxies and stars in a kind of photographic time capsule from the universe. Astronomers called it a baby picture of space.

The Hubble Ultra Deep Field built on that image in 2003 and 2004 when it used new instruments to pick out galaxies in another section of the sky which would have been too faint for Hubble's previous equipment to detect.

"We always discover things that we never even imagine," Grunsfeld said. "The universe is always more interesting than we give it credit for."

Some of the most notable discoveries were almost lost because Hubble was launched with a tiny flaw in its main mirror. Although the mirror was ground too flat by less than the width of a human hair, that was enough to throw off the focus.

"Little did we know we were launching a telescope that had a mirror that was slightly misshapen," Weiler said. "But we found a way to fix it, which we did, which the astronauts did, in 1993 and for the past 17 years Hubble's been filling the textbooks with new science." Starting with STS-61 in 1993, five teams of astronauts worked on the telescope from the space shuttle. The first installed a set of small mirrors that acted like a contact lens to clarify Hubble's vision. Since then, new instruments have been added, along with new components. Taken together, the servicing missions added years to Hubble's life.

"When we launched it in 1990, we were hoping to get 10 to 15 years out of it," Weiler said. "We're now talking about the 20th anniversary, so we're talking about five years of dividends on our investment, and we should be able to get at least another five years and maybe another seven, eight or nine years."

Astronomers were not the only ones pleased with the life extension. The 12 1/2-ton space telescope reached into the mind and spirit of the general public in an unprecedented way. Images from the telescope have made their way onto stamps, album covers and even into art exhibits.

"I think the unique thing about the Hubble is that it's truly brought science to the general public, especially the school kids," Weiler said. "It's still the most powerful telescope that humans have the ability to use and it has been since it was launched."As much as Hubble became a cornerstone for astronomy, it was also the first element of NASA's Great Observatories program which produced four telescopes that looked at the different kinds of light in the universe. The Hubble was designed to see visible light, which is the same light people see. So Hubble's pictures show the universe as it appears to the human eye.

The Compton Gamma Ray Observatory launched in 1991 to detect gamma ray bursts, some of the most energetic particles known. The Chandra X-Ray Observatory was launched in 1999 and surveyed the universe for invisible x-rays. Lastly, the Spitzer Space Telescope went into space in 2003 to look at the cooler heart of space, including dust clouds that are the nursery for stars. The Spitzer was the only NASA “Great Observatory” not launched on a shuttle. Instead, it rode a Delta II.

None of the observatories was meant to study space by themselves. Astronomers instead used one telescope's findings to study it with the others to form a nearly complete picture of a celestial place across the spectrum of light. Ground-based telescopes, which continue to grow in size and sophistication, are also used to study or confirm findings.

Although there won't be any more servicing missions by the shuttle, Weiler and Grunsfeld said the telescope is ready to make more discoveries.

"The telescope still looks in great shape," Grunsfeld said. "It's just a thrill to work on what is by many measures the most productive scientific instrument ever created by humans."

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Sandals for a Cause

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Globe – The Surfrider (Brown) – Footwear
If you like to buy products that support a cause you believe in, here’s a chance to show some love to the Surfrider Foundation. Globe pledges to donate 50% of the profits from the sale of this sandal back to the Surfrider Foundation. The sandal does have “Lite leather” [...]

Diving on Calypso Port Douglas

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Today is Anzac day so instead of working I managed to get a free trip to the reef on a boat called Calypso. Now that I'm working at the hostel I get to go on all the tours for free because I need to know what the tour is like to be able to sell it to our guests. So it was such a great day Got picked up at 8.30am by Andy and we went to the boat. Things are really quiet here still so there we

Art and music rock

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I really can't believe that I've been in Thailand for 3 weeks now The time flew by. Well in the middle of last week during our student teaching it wasn't flying by. It was intense We would find out what our teaching topic would be and what school we'd be at midafternoon the day before. Then we'd all be up until the wee hours preparing all our materials and lesson plans get up and be on the roa

Off to Nelson

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Well all packed up and stuffed in Louise's little car named Madge and we were off to Nelson. We had to drive through the beautiful Lewis Pass to get there. Took us about 6 hours to drive from Christchurch to Nelson. As it was good friday when we arrived there wasn't much open and the town was a ghost town. We found our hostel and found out that they made a mistake with our booking but using my am

Knotts Island and OBX

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I woke up again after Doug had already been up reading for a while. I left him in charge of booking Busch Garden tickets and the hotel for the next night and I went for another run down the boardwalk of Virginia Beach. Everyone was out running on the boardwalk but it was really nice anyways. We stopped for a quick bite at the continental breakfast it was ok printed our Busch Garden tickets and

BC through Washington Idaho and to Montana

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We left at about 8am. Not quite the 6am start I joked about but not a bad start at all. We drove down Hwy 33 through Rock Creek and then through Grand Forks then Hwy 395 to the border crossing. Not far from the border we stopped for lunch at Colville where we saw a giant C on the hillside with a giant cross as well.Once through Spokane we started journeying East on the I90. Along the wa

ANZAC Day

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Good morning Vietnam On Saturday I made my way to Ho Chi Minh via bus. The entry into Vietnam was smooth enough and I found a backpackers without any fuss. It was a strange feeling to be in another country and for the first time since I arrived I felt that sinking feeling I realised that my bubble had burst. I was now in a country where everything was again unfamiliar and it was now all up to me