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BHARATI VIDYAPEETH
COLLEGE OF ENGINEERING
RITESH ANAND
SWAPNIL MISHRA
PROJECT GUIDE : Prof. A. V. SUTAR
INTRODUCTION
GROUND STATION TEAM WITH IITB “PRATHAM” TEAM
MEMBERS
INFORMATION ABOUT
PRATHAM
•DIMENSION 260mm X 260mm X260mm
•WEIGHT 10KG
•10:30 POLAR SUN SYNCHRONIZED ORBIT
•3 MONOPOLE ANTENNA
•KILL SWITCH
•AUTONOMOUS
EXPLODED VIEW OF PRATHAM
OBJECTIVE
• Low cost Ground Station
• TEC (Total Electron Count)
TEC :PLOT OF ELECTRON DENSITY WITH RESPECT TO
LATTITUDE AND LONGITUDE IS CALLED TOTAL
ELECTRON COUNT MAP(TEC).
FARRADAY’S LAW
∆ɸ=4.87*10-4*f-2 ʃ ΝΒcosӨ dl
∆ɸ = CHANGE IN ANGEL OF POLARIZATION PLANE
Ν = ELECTRON DENSITY
B = MAGNETIC FIELD OF EARTH
Ө = ANGLE BETWEEN THE MAGNETIC FIELD AND THE
DIRECTION OF PROPAGATION OF THE RADIO WAVE.
f = FREQUENCY
OUR APPROACH
Receiving
LNA
LNA
ANTENNA
LNA
Two crossed
yagi antenna
Centre
frequency 437
MHz and 145
MHz
LNA
Polarization
Circuit
Analog to
Digital
Converter
Polarization
Circuit
Tracking
MOUNT
Section
Control
Circuit(PI
C µC)
ROOF UNIT
PC
Section
BURNING
UNIT
PC(RTT)
LAB UNIT
Fully fabricated antenna
at centre frequency 437Mhz
Fabricated Antenna
Fully fabricated antenna at 145 MHz frequency.
TRACKING SYSTEMS
ARS
Rotator
TRACKING SECTION
MOUNT
Control
Circuit(PI
C µC)
ROOF UNIT
BURNING
UNIT
PC(RTT)
LAB UNIT
ALGORITHM FOR STEPPER MOTOR 1
START
ACCESS VARIABLE
DELAY= TD/TS
ANGLE PER SECOND
SA=STEP ANGLE
APS=(AOSE-AOSS)/TD
EXECUTE
DELAY
AOSS=ACQUISITION
OF SIGNAL START
AOSE= ACQUISITION
OF SIGNAL END
NUMBER OF STEPS PER SECOND
NSS=APS/SA
TOTAL STEPS
TD= TOTAL
DURATION
NO
TS=TS-1
TS= NSS x TD
CHECK
IF TS=0
YES
DELAY
RESET
END
ALGORITHM FOR STEPPER MOTOR 2
START
ME= max. elevation
AE=
ME-0.05ME
EXECUTION
END
CONCLUSION
•TEC MAP OF INDIA.
•Application of Theory.
•Commercial Application of TEC.
•Social Goal
THANK YOU