Satellite Communication & Remote Sensing

EC801C

Contacts: 3L

Credits: 3

Historical background, Basic concepts, Freguency allocation for satellite services, orbital & spacecraft problems,

comparision of networks and services, modulation techniques used for satellite communication.(2)

Orbits- Two body problem, orbital mechanics, geostationary orbit, change in longitude, orbital maneuvers, orbital transfer,

obital perturbations. (2)

Launch Vehicles- principles of Rocket propulsion, powered flight, Lauchvehicles for communication satellite (1)

RF link- noise, the basic RF link, satellite links (up and down) , optimization RF link, intersatellite link, noise temperature,

Antenna temperature, overallsystem temperature, propagation factors, rain attenuation model. Tropospheric and

Ionospheric EFFECT. (5)

Multiple access- FDMA, TDMA, CDMA techniques, comperision of multiple access techniques, error connecting

codes.(5)

Satellite subsystems and satellite link design- AOCS, TT&C , power system, spacecraft antenna, transponder, Friis

transmission equation, G/T ratio of earth station. (6)

Remote Sensing:

1. Basic of remote sensing, Electromagnetic Radiation principles, Atmospheric window, Indian satellite sensing satellite system,

Active, Passive, ground based andspace based remote sensing. ( 3)

2. Spatial, spectral, Radiometric and temporal resolution, satellite sensors, detectors and scanning technique, FOV and error sources,

Image analysis and Interpretation weather RADAR, LIDAR, acoustic sounding systems, TRMM, AURA-MLS, Megha Tropiques

Alitmeter , Scatterometer, Radiometer.(9)

3. Ground based and radio oceulation techniques, spectral response of water, Sea surface temperature, wind spced, colour monitor,

clouds andacrosal, water vopor, convective system, Trace gases.(7)

Ref.: 1. Remote Sensing and GIS – B. Bhatta (oxford university press)

Remote sensing of the Environment – J.R. Jenson (Pearson)

Global Navigation satellite systems – B. S. Rao (TMH)

Satellite communication – D. Roddy (TMH)

Remote Sensing – R.A. Schowengerdt )Academic press)

Major Measurable Learning Objectives:

·         Determine the orbital parameters of a satellite

• Determine the azimuth and elevation angles and visibility of a geostationary satellite from an earth station
• Create link budgets for an uplink and a downlink, and determine carrier to noise ratio (C/N) at an earth terminal receiver
• Calculate the baseband signal-to-noise ratio or bit error rate for a satellite link
• design a communications satellite system to meet specified objectives for signal to noise ratio (S/N) in an analog baseband or BER in a digital link using appropriate multiple access techniques
• Determine the BER improvement obtained with various ARQ and FEC coding techniques
• Determine the effect of rain attenuation in a satellite link and the availability of the link based on the geographic location of the earth terminals
• Determine the type and dimensions of antennas for use on satellites and at earth stations
• Design satellite communication systems using GEO or LEO satellites to carry voice, video, or data signals using analog or digital modulation

Learning outcome (after completion of this course, the student should be able to)

* describe the fundamental principles of satellite communications
* discuss useful satellite orbits for various communication tasks
* discuss various antenna types useful in satellite communications
* describe radio wave signal propagation and disturbances
* describe signal to noise ratios in satellite communications
* calculate complete link budgets
* design complete satellite communications systems

Lesson Plan