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the landsat series of satellites were

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designed to observe the changing

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landscapes of our planet

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for those watching the launch of landsat

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5 on a clear mild march 1st in 1984 few

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could have imagined that the earth

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observing satellite with a three-year

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design life would still be in operation

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a quarter of a century later

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if someone had said

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let's have a designed life of 25 years

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they would have said it's impossible it

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is impossible all of the engineers would

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have said that it's got to be

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the most

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incredible

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earth observing mission ever both on the

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quality of the data the global survey

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aspects of the data and the incredible

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longevity

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in 2009 on its 25th birthday landsat 5

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has traveled over 130 000 times around

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the earth something like three and a

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half million miles while gathering more

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than seven hundred thousand images

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even today landsat 5 continues its

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mission

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sending back a steady stream of data an

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unparalleled history of our changing

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planet i

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i'm just forever enchanted with the

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images whether they're of deltas or the

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coastlines or the canyons

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it just is

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it's just beautiful

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we ought to tip our hat every day

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to the designers of landsat 5 and the

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people who made it well it's remarkable

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and there is certainly a component of

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luck

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involved in that but what i think the

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longevity really reflects is the

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commitment and the dedication of the

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skill

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of the team of people and the team of

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institutions that develop the system

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when you think about it this is a

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technology that was designed in the 70s

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that really has a

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throughput a capacity that equals that

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of ldcm which is going to be the next

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mission

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the flight ops team has done a fantastic

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job

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of making sure that every

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redundancy in every

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alternative route our mode of operation

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has been

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captured and utilized to its fullest

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extent in total the engineers who have

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kept landsat 5 operational have overcome

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22 separate mission anomalies they've

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sustained landsat 5 through the failed

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launch of landsat 6 and the political

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reorganizations and delayed launch of

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landsat 7 making landsat 5's longevity

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crucial for the scientists who use its

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data it's the keystone

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of the mission because it lasted so long

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it actually got us through many bumps in

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the road in in this now 35 plus years of

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observations without landsat 5

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i'm not sure we would have had a landsat

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7 i'm a true believer though that

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that

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a good mission sells itself and one

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reason landsat 5 lived on was the need

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to have it

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and the engineer's motivation to keep it

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going and

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and i believe strongly that a big part

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of it

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was the mission

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that landsat holds and

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and that transcends

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a lot of things

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for all its achievements scientific and

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technical nasa and usgs wish a happy