# data[].attributes.body
Atmospheric delays are mainly delays related to the troposphere and to the ionosphere. Tropospheric delays can lead to an error as high as 30m and they are related to the changes in temperature, pressure and humidity. Knowing these delays, instant atmospheric tropospheric status could be derived by comparing these delays with the actual position and velocity of the receiver. The emitted signal is banded as it travels through the atmosphere

# data[].attributes.body
emit their own energy and record reflection off targets

active sensors

NAVIGATION SATELLITE
a system that uses satellites to provide autonomous geospatial positioning

GPS CARRIER SIGNAL
L band

GLONASS CARRIER FREQUENCY
~1607.0625 MHz

# data[].attributes.body
emit their own energy and record reflection off targets

active sensors

eg.
~Altimeter
~RADAR
~LIDAR

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Can't create their own energy source; Rely on other external sources of energy.
eg.
~camera
~spectrometer
~scanner

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wavelength region in which our atmosphere is visible
_visible
_radio
_some infrared

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German physicist whose explanation of blackbody radiation in the context of quantized energy emissions initiated quantum theory (1858-1947)

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the number of waves that pass a given point per sec

# data[].attributes.body
distance from crest to crest

# data[].attributes.body
[1]EM radiation source [2]atmospheric interaction
[3] a subject
[4]a sensor
[5]information link to user
[6] interpretation and analysis
[7] application

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A range o frequencies or wavelengths where the electro- magnetic radiation extends

Radio: Your radio captures radio waves emitted by radio stations, bringing your favorite tunes. Radio waves are also emitted by stars and gases in space.

Microwave: Microwave radiation will cook your popcorn in just a few minutes, but is also used by astronomers to learn about the structure of nearby galaxies.

Infrared: Night vision goggles pick up the infrared light emitted by our skin and objects with heat. In space, infrared light helps us map the dust between stars.

Visible: Our eyes detect visible light. Fireflies, light bulbs, and stars all emit visible light.

Ultraviolet: Ultraviolet radiation is emitted by the Sun and are the reason skin tans and burns. "Hot" objects in space emit UV radiation as well.

X-ray: A dentist uses X-rays to image your teeth, and airport security uses them to see through your bag. Hot gases in the Universe also emit X-rays.

Gamma ray: Doctors use gamma-ray imaging to see inside your body. The biggest gamma-ray generator of all is the Universe.

# data[].attributes.body
A category of mission designed to detect, monitor subjects on Earth, other planets or far our in space.

+EXAMPLE+

Cameras on satellites and airplanes take images of large areas on the Earth's surface, allowing us to see much more than we can standing on the ground.

Sonar systems on ships can be used to create images of the ocean floor without needing to travel to the bottom of the ocean.

Cameras on satellites can be used to make images of temperature changes in the oceans