Update from Pete Worden – Part III

Guess I didn’t do such a good job with the weather balloon yesterday. It was cloudy when we got up and got progressively worse during the day – so no first science flight today. Instead the SIERRA-CASIE team has gotten everything ready to go for an early start tomorrow – when the weather is predicted to improve. Flying UAVs IS just like launching spacecraft – if it isn’t technical glitches, it’s the weather! Instead of flying several of us toured the other labs and facilities including the Zeppelin Mountain air quality laboratory and the Kings Bay Marine Laboratory- really neat work that has lots of synergy with our climate change research. We also got to talk to other international researchers and may try to assist their glacier research with CASIE instruments.

Posted by Dr. Pete Worden, Director, NASA Ames Research Center

Update from Pete Worden

NASA Ames leadership (me) arrived at Ny Alesund, Svalbard, Norway in the afternoon of July 13. What a beautiful setting: snow-capped mountains, glaciers calving icebergs into the bay, not a cloud in the sky. Temperature was in the high 50s. Guys were scraping paint from the side of a building with their shirts off! So much for the multi-layer winter garb we brought. I even brought our grad student, Matt Daniels in case a polar bear showed up and we needed to distract the bear while we fled – not a polar bear in sight, so he’s safe so far. Ny Alesund is a really cool research station with over 100 researchers present from many nations during the summer. Dinner discussions are really interesting as a result.

The Sierra UAV and CASIE research plans are ready to go. But test flights revealed some problems with the autopilot. We are calling back to the manufacturer in Oregon. Hopefully we will have it fixed and do test flights tomorrow (Tues) ready for first science flights Wednesday. I’d say “in the morning” – but when the sun doesn’t set ‘morning’ seems a little odd. We are really excited about the research we can do on polar ice characteristics. This is a lot like launching a satellite – so much depends on the equipment working perfectly and the weather cooperating for a launch.

Godspeed – CASIE!

Posted by Dr. Pete Worden, NASA Ames Center Director

Update from Pete Worden – Part II

It’s a great day for flying here in Ny Alesund and we got SIERRA out on the runway and fired up ready for our test flight. Things appeared ideal, except for the arctic tern that dive-bombed us for being too close to its nest. But then Murphy struck. The battery in the aircraft showed a large power drain – perhaps indicative of a short. So today’s flight was postponed until we could trouble shoot. Maybe we can try a test flight tomorrow.

Just to make sure we had assuaged the weather gods we visited the German weather station here at Ny Alesund. The Director there, Dr. Marcus Schumacher even let me launch the daily weather balloon! It seems the weather will be good the next few days – so we hope things will be fixed soon.

NASA Ames Center Director Pete Worden holding a balloon at Svalbard

A few hours later they were fixed! The team did a 2 hour test flight with everything working perfectly – So back on track for first science flights on Wed, Jul 15. Once again found out that having senior people go away and tour things such as weather stations and talk to other senior people allows the team to fix stuff!

Posted by Dr. Pete Worden, NASA Ames Center Director

The NASA SIERRA Unmanned Aircraft System (UAS)

Aircraft provide a necessary perspective on earth system processes and serve to complement NASA satellite missions. Instruments on aircraft provide in situ measurements and high resolution imagery that enable on-orbit sensor calibration and algorithm development and validation. Unmanned Aircraft Systems (UAS) are of particular value where long duration or long range measurement requirements preclude a human pilot, or where the remoteness and harshness of the environment put pilots and high value aircraft at risk. The CASIE mission does well to demonstrate the need for both of these criteria and complements arctic sea ice measurements collected by ICESat.

SIERRA UAS being prepared at Svalbard

The Science Instrumentation Environmental Remote Research Aircraft (SIERRA) is a medium class, medium duration UAS originally designed by the Naval Research Laboratory (NRL). Researchers at the NASA Ames Research Center developed a partnership with NRL to evaluate the utility of this class of aircraft to the NASA earth science community. The relatively large payload (~100lbs) coupled with a significant range (500 miles) and small size (20ft wingspan) makes it an attractive observational platform that complements the current suite of modified NASA science aircraft. This UAS conducts very low altitude missions for tropospheric chemistry sampling and remote area surveys such as arctic ice reconnaissance.

SIERRA UAS being prepared at Svalbard

For this mission the payload suite includes 2 laser altimeters, a synthetic aperture radar (SAR), zenith- and nadir-pointing micro-spectrometers, digital still and video tracking cameras, a pyrometer, and a zenith pointing pyronometer. All instruments are contained in the SIERRA in the nose-cone with the exception of the SAR which is mounted on the side of the fuselage in a pod. The SIERRA team is proud to be supporting the NASA Science Mission Directorate, Earth Science Division, Cryospheric Science Program and the International Polar Year by partnering with Dr. Jim Maslanik (U. Colorado, Boulder) and his science team on this important mission to observe arctic sea ice processes.

Posted by Matt Fladeland, SIERRA project manager

Introduction to the NASA CASIE Mission

NASA CASIE Mission Logo

CASIE is the aircraft campaign portion of the larger, NASA-funded project titled “Sea Ice Roughness as an Indicator of Fundamental Changes in the Arctic Ice Cover: Observations, Monitoring, and Relationships to Environmental Factors. This 3-year research effort, which combines satellite data analysis, modeling, and aircraft observations, includes scientists, engineers and students from the University of Colorado, Brigham Young University, Fort Hays State University and NASA’s Jet Propulsion Laboratory working together with research aviation specialists from NASA’s Ames Research Center.

Our project is attempting to answer some of the most basic questions regarding the future of the Arctic’s sea ice cover. In particular, our work will help us better understand one of the most fundamental changes in sea ice cover in recent years – the loss of the oldest and thickest types of ice from within the Arctic Ocean. This change has been rapid and extreme. For example, our analysis of satellite data shows that the amount of older ice in 2009 is just 12% of what it was in 1988 – a decline of 74%. The oldest ice types now cover only 2% of the Arctic Ocean as compared to 20% during the 1980’s.

Not only does this change affect the total amount of ice in the Arctic, but it also affect the ability of the ice cover to resist increased warming. In turn, this loss of the old ice types will influence activities such as shipping and mineral exploration, and it is important for marine mammals and fish that use the ice cover as safe havens and platforms.

CASIE’s role in this project is to provide very detailed information on ice conditions by using a small unmanned aircraft (NASA’s SIERRA) that can fly long distances at low altitudes – a job that can be difficult and dangerous for large, manned aircraft, especially in the harsh Arctic environment. The SIERRA is carrying a variety of remote sensing instruments that will provide information on ice surface roughness and topography, thickness, reflectance, and age. An advantage of the SIERRA compared to smaller unmanned aircraft systems (UAS) is that the SIERRA is big enough to carry all these sensors at once, yet small enough to not require a large hanger or runway.

Ny-Alesund, Svalbard is an ideal location for CASIE since it provides access to the region of the Arctic known as Fram Strait. Much of the sea ice that leaves the Arctic Ocean due to transport by winds and currents passes through this relatively narrow (500 km; 311 mile) stretch of water between Svalbard and the northeastern corner of Greenland. In addition to the science benefits that Svalbard offers for CASIE, the research base at Ny-Alesund is a first-class facility that is providing everything we need for a successful experiment.

Next to this blog, we will also regularly post CASIE mission and flight updates on our @NASA_CASIE twitter.

Posted by Dr. James Maslanik, Principal Investigator, University of Colorado, Boulder