GRAA NEWSLETTER
P.O. Box 1184, Greenbelt, MD 20768-1184
March 2017 | http://graa.gsfc.nasa.gov | 33rd Year of Publication |
IMPORTANT DATES
March 14 | Mark your calendar for the GRAA Luncheon at 11:30 a.m. at the Greenbelt American Legion Post #136 at 6900 Greenbelt Road. Reservations are required for our venue, so please contact Alberta Moran on her cell phone at 301-910-0177 or via her new email address at bertiemae90@gmail.com not later than noon on Friday, March 10th. Our featured speaker will be Dr. Michael Mumma, Senior Scientist in the Solar System Exploration Division of the Sciences and Exploration Directorate, and his presentation topic will be “Methane on Mars.” |
April 11 | Mark your calendar for the GRAA Luncheon at 11:30 a.m. Dr. Nickolay Krotkov, Research AST in the Solar System Exploration Division of the Sciences and Exploration Directorate, will be our featured speaker. The title/subject of his presentation will appear in next month’s newsletter. |
COMMENTS FROM TONY COMBERIATE, GRAA PRESIDENT: Our February luncheon speaker was Dr. James Gleason, Chief of the Atmospheric Chemistry & Dynamics Laboratory of the Sciences & Exploration Directorate and the Joint Polar Satellite System (JPSS) Senior Project Scientist. His talk, entitled “ JPSS – The Next Generation of Polar-Orbiting Weather Satellites – More Than Weather: Measurements to Data to Information,” described JPSS as the generational upgrade of the Polar Operational Environmental Satellite (POES) weather satellite. The five-satellite system consists of the Suomi National Polar-orbiting Partnership (NPP) spacecraft, launched in 2011 and the four JPSS 1-4 satellites, the first of which will be launched this fall and the other three on five-year centers. Together with the Geostationary Operational Environmental Satellite (GOES) system spacecraft, JPSS will provide the US with weather data for the next 25 years. The spacecraft carry five instruments: The Visible Infrared Imaging Radiometer Suite (VIIRS), which takes higher spatial resolution observations in the visible bands of the land, ocean and atmosphere than the earlier POES instrument; the Cross-track Infrared Sounder (CriS), a Fourier Transform nadir scanning interferometer, which takes 3-dimensional profiles of temperature, pressure and moisture; the Advanced Technology Microwave Sounder (ATMS), which takes atmospheric temperature and moisture for weather forecasting and climate monitoring; the Ozone Mapper Profiler Suite (OMPS), which includes three hyperspectral ozone instruments; and the Clouds and Earth’s Radiant Energy System (CERES) to measure solar-reflected and Earth-emitted radiation at the top of the atmosphere. Jim explained how advanced measurements from the polar-orbiting satellites being a new dimension to 3- to 5-day weather forecasting. One huge advantage is more accurate prediction of severe weather events, like hurricanes. Improved forecasts of Hurricane Irene’s path in 2011 pinpointed a small area around Virginia Beach that needed to be evacuated, avoiding the evacuation of a much larger area of the East Coast. A new feature or the NPP is a VIIRS day/night band capable of mapping clouds by moonlight. This is a huge advantage to forecasters in Alaska, who deal with darkness for up to six months of the year. Sensing valley fog, which is a significant hazard, is another capability of the system. Along with monitoring city lights, the instrument can also detect gas flares from drilling sites and determine the amount of wasted methane. In addition to detecting energy usage, the VIIRS instrument provides useful economic assessments in other areas including fires, vegetation, changes in growing seasons, food and agricultural prediction, aerosols, smoke, and dust – all from an instrument designed to do cloud imagery. In closing, Dr. Gleason mentioned that the VIIRS Blue Marble image appeared on a US postage stamp last year.
FROM THE GODDARD ARCHIVES – IT HAPPENED IN MARCH: Fifty years ago, on March 8, 1967, a Delta-C rocket launched the third Orbiting Solar Observatory (OSO-3) from Cape Canaveral, FL. The objectives of the spacecraft were to perform solar physics experiments above the atmosphere during a complete solar cycle and to map the celestial sphere for direction and intensity of ultraviolet light, X-ray, and gamma radiation. Only real-time data transmissions were received from the satellite after the last tape recorder failure on June 27, 1968. The last data transmission from the OSO-3 occurred on November 10, 1969, and the spacecraft descended into the atmosphere on April 4, 1982. We offer a shout out to Dr. William Behring, for his role as Project Scientist in the OSO-3 mission.
WANTED - YOUR MEMORIES OF GODDARD: Alberta Moran has informed Ye Ed that the Visitor Center on the Greenbelt campus is currently undergoing an interior face lift. Management is looking to come up with some exciting new exhibits and think GRAA members could probably provide the right input. One possible exhibit could be to highlight facts about Goddard that occurred since Goddard came to Greenbelt (e.g., for several weeks in the late ‘50s Goddard was known as the Beltsville Space Center and another that Goddard was built on 500 acres of a pig farm belonging to the US Department of Agriculture). Another thought is to possibly showcase items that have been developed over the years by Goddard employees and used for the benefit of our lives, yet folks may not know were actually inspired and/or created at Goddard. Any suggestions you may have will be appreciated, so please accept the challenge and forward your ideas to Alberta Moran, 11609 Emack Road, Beltsville, MD 20705 or via email to bertiemae90@gmail.com.
THOUGHT FOR MARCH: As a senior citizen, GRAA members may want to consider signing up for services at one of the Hokey Pokey Clinic franchises located near your home. The catchy slogan for the clinics is: We will teach you how to “turn yourself around” in less than a month (of Sundays, that is).
REMEMBERING OUR FORMER COLLEAGUES: