FRAMED FROM THE HINDU -JUNE 2018
Q.350 With reference to the “Polargap Project” ,consider the
following statements :
1. It is an international mission to capture data about the
Earth’s electrical & magnetic field
2. This project is largely funded by the World bank
Which of the statements given above is/are correct ?
A) Only 1
B) Only 2
C) Both are correct
D) Both are incorrect
Ans. D
PolarGAP is an ambitious international mission to capture new and
critical data about the Earth’s global gravity field.
Innovative radar systems and Lidar technologies will also be
deployed from Twin Otter aircraft to fill the ‘data gap’ in
measurements of surface elevation over the South Pole region south
of 83.5°.
Two earth observing satellite missions (GOCE and CryoSat 2)
mounted by the European Space Agency (ESA) revolutionised
scientists’ ability to ‘map’ the Earth’s global gravity field and
monitor how Earth’s ice fields are responding to global
change. However, because
GOCE’s orbit did not cross the Poles there is a data gap at the South Pole.
The PolarGAP project will collect new gravity data and combine
them with datasets from other Antarctic missions to build
the first accurately constrained global gravity model. This is
essential as global gravity data provide unique information
on mass distribution and transport in the Earth System, linked to
processes and changes in the Solid Earth, hydrology,
cryosphere, oceans and atmosphere. Key applications of gravity
data include geodetic studies (levelling and mapping),
navigation (GPS/GLONASS) and satellite orbit planning.
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