July 23 History Quiz — 5 Questions

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How Did Landsat 1 Turn Earth Into Digital Data?

Question 1 of 5

Why did the Multispectral Scanner become Landsat 1's primary imaging instrument?

AIts orbital data proved superior while the Return Beam Vidicon developed an electrical problem

BIt was the only instrument able to transmit radio signals to Earth

CCongress ordered NASA to remove all camera based instruments

DThe scanner was added several years after the satellite reached orbit

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Question 2 of 5

Which engineer designed the Multispectral Scanner flown on Landsat 1?

AEthelwyn Pecora

BVirginia Norwood

CSally Ride

DNancy Grace Roman

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Question 3 of 5

What combination best describes Landsat 1's observing pattern?

AOne orbit every 24 hours with annual repeat coverage

BA geostationary position with continuous views of California

CAbout 103 minutes per orbit with an 18 day repeat cycle

DA lunar orbit with monthly views of Earth's far side

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Question 4 of 5

How did Landsat 1's scanner differ from an ordinary color camera?

AIt returned only handwritten weather reports from ground stations

BIt photographed one city in a single visible light band

CIt measured sound waves reflected from forests and oceans

DIt recorded four spectral bands, including near infrared measurements

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Question 5 of 5

Which result shows that Landsat 1 exceeded its original mission plan?

AIt stayed in service until January 1978 despite a one year design life

BIt returned to Vandenberg for repairs every 18 days

CIt replaced every weather satellite before the end of 1972

DIt achieved complete cloud free coverage of Earth on its first orbit

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How Did Landsat 1 Turn Earth Into Digital Data?

Landsat 1 launched a new era of civilian Earth observation, proving the value of digital multispectral images from orbit.

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