JNTU
JNTU B.Tech IV Year GLOBAL POSITIONING SYSTEM Previous Question Paper (June - 2024 - R16)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
What is space segment. Explain it in brief
Answer
The space segment consists of the constellation of GPS satellites orbiting the Earth. Its primary function is to transmit precise timing and orbital data (ephemeris) to users, enabling the determination of position, velocity, and time.
What are the advantages and disadvantages of using UTM coordinates in GPS/GNSS positioning?
Answer
The Universal Transverse Mercator (UTM) system provides the advantage of using a simple Cartesian grid (meters), which simplifies distance and area calculations compared to geographic coordinates. However, its main disadvantage is the distortion of scale and shape that increases as one moves away from the central meridian of each zone, and the discontinuity at zone boundaries.
What are the GPS signal components
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How can we calculate power level in GPS
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What is multipath mitigation?
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What is clock error?
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What is downlink subsystem ?
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What is Augmentation system?
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What are disadvantages with least squares method?
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List out the applications of GPS
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Part B
Explain briefly how the user position is computed.
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Explain the GPS constellation in detail.
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Write a short note on GPS aided Geo Augmented Navigation (GAGAN) architecture.
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Explain the role of control segment in GPS system.
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If the satellite travelling time observed by the GPS receiver from a particular GPS satellite is 70ms, what is the pseudo range observed in the satellite?
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Compare pseudo range estimation and frequency estimation in GPS.
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Write a short note on:
Anti spoofing
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Selective Availability
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Signal Extraction.
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How to estimate errors using dual frequency GPS receiver.
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What are specifications to design antenna and receivers?
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Explain the following errors in GPS receivers:
Ionospheric errors
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Tropospheric errors
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SA errors.
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With the help of a neat diagram explain Local Area DGPS.
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How the GEO orbit can be determined by covariance analysis.
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Compare GEO uplink and down link systems.
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Pseudo range measurements observed on L1 and L2 frequencies are 29342925.29949 m and 29342928.24648 m respectively. Find the TEC and ionospheric range delay for L1 and L2 frequencies.
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Explain the RINEX format of observation and navigation data files.
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Write a short note on Observation data and navigation message data parameters.
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Write a short on:
GPS in surveying
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Mapping and Geographical Information System
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Precision approach Aircraft landing system.
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