Appreciation of Earth Observing Systems

 

Topex Poisedon Altimeter

Page history last edited by Avril Behan 2 yrs ago

NASA dual-frequency (C- and Ku-band) altimeter on TOPEX/Poseidon

 

Question 1

Into what general category of EOS does the instrument fall?

Microwave Altimeter


Question 2

What capture technology is used?

Altimetry


Question 3

Is the sensor active or passive?

Active


Question 4

At what wavelength(s) does the sensor function?

Microwaves at 13.6 and 5.3 GHz


Question 5

What resolution does the sensor have – temporal and spatial?

Temporal

A few kilometres

Spatial

10 Days


Question 6

Is the sensor carried on an airborne or spaceborne platform? What is that platform – typically?

Spacebourne Platform – Topex/Posideon


Question 7

Who developed/launched/manages the sensor?

NASA developed as well as launched and managed by them.


Question 8

Can data be purchased from service providers?

Yes -

PO.DAAC - to order data

NASA HQ's Oceanography Program

Earth Observatory - for additional data sets


Question 9

What products are available?

Sea Surface Height Anomalies


Question 10

At which main application areas is the sensor aimed?

Determining wind directions indirectly via patterns of waves generally in open water – seas and oceans. Measures range (the distance from the satellite to the Earth's surface), wave height and wind speed.


List 2 specific projects, where they have been reported, their goals and their outcomes.

Mission 1- to determine height of sea surface –Done globally , aimed to produce charts and models of sea surface. This mission was successful.

Mission 2- to determine wind speeds (prevailing).This is done globally to aid meteorologists and help understand the weather patterns globally.This mission was successful.

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