To all beloved persons. Hello Every One, I am sharing here Global Navigation Satellite System Notes (GNSS) Notes. The topic will redirect to different links. Kindly look into it. 

MID 1 GNSS PAPER:  👉👉 CLICK HERE

GR20 GNSS Notes

Syllabus

The syllabus for the Global Navigation Satellite System : 

UNIT-I 

GPS fundamentals 

GPS System Segments: 

• space, control and user segments
• Principle of operation
• Current status of GPS satellite constellation

Orbital Mechanics:

•  GPS ephemeris data
• algorithm for computation of satellite’s position from ephemeris data

Time References: 

• solar and sidereal days
• UTC time
• GPS time.

UNIT-II 

GPS signals Legacy GPS signals: 

• Signal structure, Operating frequencies
• C/A and P-Code
• Navigation message

Modernized GPS signals: 

• list of signals and their significance. 

Range measurements: 

• code and carrier measurements
• User position estimation with PRN codes. 

Coordinate systems:

• Earth Centered Earth Fixed (ECEF) coordinate system
• Earth Centered Inertial (ECI) coordinate system
• Geodetic coordinate system
• Ellipsoid and Geoid
• Regional and Global Datum
• World Geodetic System (WGS-84). 

UNIT-III 

GPS error sources 

• Satellite clock error
• ephemeris error
• Receiver clock errors
• satellite and receiver instrumental bias
• Multipath error
• receiver measurement noise
• ionospheric error 
• tropospheric error
• Klobuchar model
• ionospheric delay estimation using dual frequency measurements and UERE

Dilution of precision: 

• HDOP
• VDOP
• TDOP
• PDOP
• GDOP. 

 UNIT-IV 

Data formats: 

• RINEX Observation and Navigation Data formats 

GNSS: 

• architecture
• operation and signals of other global satellite systems such as Galileo, Beidou, GLONASS and regional systems such as IRNSS, QZSS.

UNIT-V 

Differential GPS (DGPS): 

• Principle of DGPS, 

Types of DGPS: 

• Local Area DGPS (LADPS)
• Wide Area DGPS (WADGPS). 

GPS Augmentation systems: 

Principle of operation of Satellite Based Augmentation system (SBAS) 

Ground Based Augmentation System (GBAS)

 GNSS Applications:

• Surveying
• Mapping
• Marine
• air and land Navigation
• Military and Space Application. 

I am sharing 3 text books here. 

TB1 👉 {getButton} $text = {CLICK HERE}$icon={link}

TB2 👉 {getButton} $text = {CLICK HERE}$icon={link}

TB3 👉 {getButton} $text = {CLICK HERE}$icon={link}

Unit Wise Topic Links

GPS System Segments 👉 {getButton} $text = {CLICK HERE}$icon={link}

Topic Wise Links

• Current status of GPS Satellite Constellation 👉 - {getButton} $text = {CLICK HERE}$icon={link}

• Satellite Clock Error 👉  {getButton} $text = {CLICK HERE}$icon={link}

In TB1, pg no 478. 👆👆

Unit Wise Topics  

Unit 5 

• GNSS Applications 👉 -  {getButton} $text = {CLICK HERE}$icon={link}  

Unit 3 

• GNSS Errors 👉 - {getButton} $text = {CLICK HERE}$icon={link} 

• Troposheric error, Receiver Noise, Multipath, Ionospheric 👉 {getButton} $text = {CLICK HERE}$icon={link}

• KLOBUCHAR MODEL - 👉 {getButton} $text = {CLICK HERE}$icon={link}

Unit 2

Unit 1 

• Principle of Operations - TB1 PG No 10