seminar ppt on tidget( tracking widget - a gps advancement) by nithin k thomas
DESCRIPTION
This was the slide i used for my seminar presentation. Its about an advancement in gps developed by navsys corp. which may become reality soon.TRANSCRIPT
TRACKING WIDGET(TIDGET)
Nithin K Thomas
S7 E&I CEK
Familiarization with GPS
Components:
1. Space Segment2. Control Segment3. User Segment or Receiver
• Space Segment 24 satellites in 6 orbital planes. 30 satellites at present at 11000miles above earth.
• Control Segment Ground stations on earth. Monitors orbiting and performs clock corrections.
• Receiver Navigation and precise positioning. Timing and research projects.
Positioning using Satellites
ADVANCED FORMS OF GPS
Differential GPSusing two ground based receivers.
Carrier-Phase GPScarrier frequency is very high.
Augmented GPSuses one geostationary satellite
Reasons for TIDGET
• For aircrafts, multiple stand alone GPS receivers are required.
• Power, mass and volume.
• Continuous link with satellites during navigation.
TIDGET Architecture
Multiple Antenna Installation for All -
Round Visibility
To achieve high accuracyTo prevent degradation of
GPS signals.
TIDGET Hardware Assembly
• Three identical circuit boards.• One master and two slaves.
Each board consists of :• Connectors:
1. Avionics host connection( power, control and data).
2. GPS antenna connection.3. Stack-thru connection.
• Low-Noise Amplifier.• Integrated GPS front-end.• CPLD with SRAM.• TCXO and Buffers.
Hardware Performance• Snapshot receivedthrough antenna.
• RF to digital base-
band by integrated MASTERGPS front-end. UNIT
• GPS RF circuitrycontrolled by CPLD.
• Snapshot processed by the software.
Software Processing
Working of TIDGET in Brief
• Snapshot from satellite to Antenna.
• Low-Noise Amplifier.
• RF to digital by GPS front-end.
• Snapshot saved in the Buffer.
• Position determination using SDR.
• RF circuitry turned off till next snapshot.
CONCLUSIONThe TIDGET Advantages:
• Average Power Consumption is very low.
• Continuous link with satellite not required.
• Thermal problems avoided (>50ms).
• Multiple snapshots can be stored in queue.
THANK YOU