Author Topic: Earth Observing-1 (EO-1) satellite  (Read 752 times)

Online catdlr

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Earth Observing-1 (EO-1) satellite
« on: 03/30/2017 08:50 PM »
The Little Satellite That Could

Credit: NASA's Goddard Space Flight Center/Matthew Radcliff

Published on Mar 30, 2017
The satellite was tiny, the size of a small refrigerator, only supposed to last one year and constructed and operated on a shoestring budget — yet it persisted for a total of 17 years on orbit.

On March 30, 2017, the satellite was powered off due to a lack of fuel, and will slowly spiral down to Earth. It is expected to burn up in the atmosphere in 2056.

“The Earth Observing-1 satellite is like ‘The Little Engine That Could’,” said Betsy Middleton, project scientist for the satellite at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. With more than 1,500 research papers generated and 180,000 images captured, the Earth Observing-1 (EO-1) satellite has exceeded expectations in both its technology and research goals, as well as longevity.

Tony De La Rosa

Offline AegeanBlue

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Re: Earth Observing-1 (EO-1) satellite
« Reply #1 on: 03/31/2017 05:28 AM »
EO-1 was a test satellite to see how hyperspectral from space would look like. Its image width is very small, over time its sensor constantly degraded, repeat imaging was downright nonexistent except for a small test patch in Maryland. Still it was quite valuable to help develop methods both on the operations side and the science side to treat hyperspectral imagery from space

Offline Star One

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Earth Observing-1 (EO-1) satellite
« Reply #2 on: 03/31/2017 07:27 AM »
Reading below throws strong doubt on the decision to keep it going as long as they did as far as scientific return is concerned.

Decommissioned Earth science satellite to remain in orbit for decades

EO-1, however, will not comply with another standard practice that calls for spacecraft in low Earth orbit to reenter within 25 years of the end of its mission. NASA, in a statement earlier this month about the decommissioning of EO-1, estimates the spacecraft will reenter in 2056, 39 years from now.

That extended post-mission lifetime in orbit stems from a decision made in 2007 to extend EO-1’s mission. The project sought and received from NASA a waiver to those orbital debris mitigation guidelines, allowing it to use its remaining fuel to maintain its orbit at an altitude of about 700 kilometers rather than lower its orbit to reduce its orbital lifetime.

However, EO-1 mission had been criticized in some senior reviews for limited scientific benefit from the data provided by its instruments. The 2015 report noted that the senior review panel “was disappointed that the EO-1 team continued to emphasize EO-1’s ability to acquire rapid imagery and potential to test future instruments rather than provide evidence of the scientific use and specific users for EO-1 data as requested.”

“The mission continues to operate as a technology demonstration project but desires to be funded and considered as supporting science, yet limited contribution to the NASA Earth science mission was provided,” the same report later stated, complaining that EO-1 project members were “unresponsive” to criticisms from prior senior reviews about the documentation and distribution of data products from the mission.

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« Last Edit: 03/31/2017 07:28 AM by Star One »