Archive for the ‘Observation’ Category
Ah, summer in Greenland. Temparatures in the mid-20′s F and the sun is out — all day. Time to go out and take a stroll.
Let’s verify what Cryosat-2 sees from space. No need to be alarmed. Just follow the little yellow rope back to where you came from.
Meanwhile, on the other side, Antarctica is losing ice at an alarming rate! Read this abstract from Geophysical Research Letters and see what all the fuss is about…
We use 3 years of Cryosat-2 radar altimeter data to develop the first comprehensive assessment of Antarctic ice sheet elevation change. This new dataset provides near-continuous (96%) coverage of the entire continent, extending to within 215 kilometres of the South Pole and leading to a fivefold increase in the sampling of coastal regions where the vast majority of all ice losses occur. Between 2010 and 2013, West Antarctica, East Antarctica, and the Antarctic Peninsula changed in mass by −134 ± 27, −3 ± 36, and −23 ± 18 Gt yr−1 respectively. In West Antarctica, signals of imbalance are present in areas that were poorly surveyed by past missions, contributing additional losses that bring altimeter observations closer to estimates based on other geodetic techniques. However, the average rate of ice thinning in West Antarctica has also continued to rise, and mass losses from this sector are now 31% greater than over the period 2005–2011.
The ESA’s been tracking this for some time and getting something done before summer vacations hit in Europe is an honored tradition.
The view of Sochi from the ISS, via NBC. Dayime image below…
We’ve been fans of DLR’s Heavens Above site for years, a site that predicts when orbiting spacecraft are expected to be seen from Earth. Iridium flares are especially fun to predict to impress your friends.
SpyMeSat was created by Orbit Logic, Inc., which specializes in supplying software to the aerospace and intelligence communities. The app, which was released last week, gets its data from organizations like NORAD, but it doesn’t use any classified information. In other words, any terrorists or human rights abusers looking to hide from satellites already can access the info through other data sources. The app’s chief purpose is to gather all that data into one cheap app.
“We were careful to only include satellites that are unclassified and whose orbits are published by NORAD,” Orbit Logic president Alex Herz said. “Even the sensor data — resolution, etc. — was taken only from the websites published by the satellite operators. So everything SpyMeSat is using is open and public.”
The app is accurate to 16 meters. You can set SpyMeSat to give you alerts for any location, track satellites even when they’re not overhead, call up resolution specs for each model, and learn about their various on-board sensors. Satellite models in the database are owned and operated by either public or private bodies, including the GeoEye, France’s SPOT-5, India’s CartoSat-2A, DigitalGlobe WorldView, and RADARSAT-2 of Canada.
It may save you some embarrassment.
The folks over at SkyTruth are doing a really good job, using existing observation spacecraft and they’re ready to send up a balloon to document what other ways frackers are polluting.
I missed this coverage over the summer…
Thanks to that and lots of other people, they’ve met their funding goal on indiegogo. The project…
SkyTruth is teaming up with Space for All for a skytruthing mission over the massive Bakken shale oil and gas fields in western North Dakota. We’re planning to launch a sensor package from the ground to the edge of space tethered to a high altitude balloon rig, courtesy of Space for All. We will combine on the ground observations with detections from the balloon rig and measurements we are making from space to measure the amount of natural gas flaring there. This will help us test the accuracy of our satellite-based flaring detections so we can do a better job of monitoring and reporting on the amount of environmentally damaging (and unnecessary and wasteful) flaringthat happens in the Bakken and elsewhere in the world. The more good data we can collect on when, where, and how much, the more we can help groups that are working to reduce and eliminate it. This is what we mean by skytruthing – using remote sensing and mapping to understand and change the world.
Read more about the Bakken and oil shale fracking in this great piece by National Geographic: The New Oil Landscape
Watch their video pitch…
Hat tip to Motherboard.
Always nice to see a Delta launcher go. Extra nice to see a heavy go!
The payload is for the NRO, so we can only speculate as to what it was for. As reported by the L.A. Times…
Although little is publicly known about what exactly the rocket will be carrying into space, analysts say it is probably a $1-billion high-powered spy satellite capable of snapping pictures detailed enough to distinguish the make and model of an automobile hundreds of miles below.
If this is a LEO spacecraft, it’s probably on the big side, given the Delta IV Heavy’s capability.
Great job by NOAA in putting this video together, marking the retirement of the GOES-12 spacecraft.
NOAA’s GOES-12 satellite was decommissioned on August 16th, 2013 after 3,788 days in service. From April 2003 — May 2010, GOES-12 served as GOES East, providing “eye in the sky” monitoring for such memorable events as the 2005 Atlantic hurricane season and the series of blizzards during the winter of 2009-2010. After suffering thruster control issues, GOES-12 was taken out of normal service and moved to provide greater coverage of the Southern Hemisphere as the first-ever GOES South. During that time it provided enhanced severe weather monitoring for South America.
This animation shows one image from each day of the satellite’s life — a total of 3,641 full disk visible images.
Instruments on the ground or attached to weather balloons give us wind velocity measurements, helping us predict weather changes and forecasting. And they do a pretty good job with it. Anybody with a radio, TV or Internet device can avail themselves of the weather forecast. Or a newspaper. Remember those?
Although I appreciate being able to know what the weather will be like after tomorrow or next week, I long for the days when we would simply look toward the sky, feel the wind and/or humidity and make an experienced guess on the next day’s weather. Winds from the south and we’ll get rain. Chilly wind from the northwest indicates a change toward colder days ahead.
If the wind makes a difference on the ground, think about what it would mean if we were able to use an instrument in space. Enter the ESA’s Aeolus mission, which includes the Aladin UV laser instrument.
The Aeolus satellite will carry a single, but complex, instrument that will probe the atmosphere to profile the world’s winds. Reliable and timely wind profiles are urgently needed by meteorologists to improve weather forecasts. In the long term, they will also contribute to climate research.
Aeolus carries a pioneering instrument called Aladin that uses laser light scattering and the Doppler effect to gather data on wind.
The laser generates high-energy UV light, which is beamed towards Earth through a telescope. As the light travels down through the atmosphere, it bounces off molecules of gas, particles of dust and droplets of water.
By comparing the shift in frequency of the received light from the transmitted light caused by the Doppler effect, the motion of the molecules in the atmosphere can be measured, revealing wind velocity.
The laser transmitter is being developed by Selex-ES in Italy.
It has been a very long and difficult undertaking – forging new technologies in many areas such as optics, opto-electronics, precision mechanics and thermo-mechanical design.
Recent tests show all this effort has not been in vain.
Throughout three consecutive weeks, the laser transmitter remained perfectly stable at full energy, producing a total of 90 million UV laser shots.
Considering that each shot is 5 MW, peaking at an intensity similar to that of a lightning strike and that this is repeated 50 times a second – the stress on the optical components that shape and guide the laser beam is tremendous.
Predicting weather and climate changes using a space-based UV laser. Cool.
It still amazes me how many resources went into spy satellites in the 60′s and 70′s. Designing, building, launching and operating — all under super-secret conditions — using transistor radio era technology must have been mind-boggling for the non-scientists. And film. They used film to get the images they needed. And how did they get the film back to earth? Why, drop the huge canister in the ocean, of course!
Recent news about the declassification of rescue mission in 1972 to retrieve a canister that dropped into the ocean without a parachute. Imagine that: the rescue mission was classified!