What Does Visible Imagery Show?

What does visible imagery show? satellite pictures

How do satellite images help geographers?

Satellite Images and computers can help geographers improve their knowledge of the world by forming images from what an area looks like from above Earth . They collect information that we cannot see from the planet’s surface that helps geographers make accurate maps.

What do we use to take visible light images of our weather?

An instrument on the satellite, called an imaging radiometer , measures the intensity (brightness) of the visible light scattered back to the satellite. I should note that, unlike our eyes, or even a standard camera, this radiometer is tuned to only measure very small wavelength intervals (called “bands”).

Which imaging is used for weather forecasting?

Infrared spectrum

The thermal or infrared images recorded by sensors called scanning radiometers enable a trained analyst to determine cloud heights and types, to calculate land and surface water temperatures, and to locate ocean surface features.

Would a visible image from a weather satellite be more useful during the day or at night Why?

The bottom line is that standard visible satellite imagery is only useful during the local daytime because we are measuring the amount of sunlight being reflected from clouds and the surface.

But, visible satellite imagery also has its limitations: it’s not very useful at night, and it only tells us about how thick (or thin) clouds are . By limiting our “vision” only to the visible part of the spectrum, we diminish our ability to describe the atmosphere accurately.

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Visible satellite images depend on the availability of reflected sunlight . Infrared satellite images (IR) result from radiometers that detect emitted electromagnetic energy so meteorologists rely on IR images to track storms overnight.

Disadvantages: Only useful during the daylight hours ; BR>Difficult to distinguish low clouds from high clouds since all clouds have a similar albedo (reflect a similar amount of light); Hard to distinguish snow from clouds in winter.

Answer: There are three types of satellite image visible, infrared, and water vapor .

What advantages does an infrared satellite image offer over a visible satellite image for monitoring the state of the atmosphere? a. Infrared satellite sensors detect infrared radiation that is continually emitted to space by the Earth-atmosphere system . Hence, infrared images can be obtained 24 hours a day.

The first (and most obvious) way to tell the difference between clouds and snow cover is to put the satellite image in motion. Clouds tend to move while snow cover stays in motion .

Sensors on weather satellites scan the Earth, taking measurements of reflected light and infrared temperatures . These measurements are then digitized and sent back to Earth where they can be turned into images.

In addition to monitoring weather systems, the satellites provide other data, including vertical temperature profiles and moisture measurements . 1. Weather satellites are orbiting platforms from which onboard instruments can sense light and heat energy from the atmosphere and underlying surfaces.

Satellite data can improve transparency of agricultural activity and output, as it helps assess crop conditions and environmental risks . This enables companies to develop index-based insurance products.

The most common types of satellite images are only able to see the “top” of the sky — if it is a cloudy day, the satellite will only be able to see the tops of the clouds .

Tall cumulus clouds or Cumulonimbus clouds

The high tops of cumulonimbus clouds are cold and thus appear bright white on infrared imagery. The high tops of cumulonimbus clouds appear white on water vapor images because their high-altitude ice crystals emit “cold” 6.7 micron radiation.

A visible satellite image is created by looking only at the visible portion of the light spectrum and is thus only really useful during daylight hours. The Infrared (IR) image comes from the satellite detecting heat energy in the infrared sepectrum and thus does not depend on visible light.