Radio Telescope Radio Telescope Team Ongo- - 02c 02c Team Ongo - - PowerPoint PPT Presentation

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Radio Telescope Radio Telescope Team Ongo- - 02c 02c Team Ongo - - PowerPoint PPT Presentation

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Spacecraft Systems Operations Lab: Spacecraft Systems Operations Lab: Radio Telescope Radio Telescope Team Ongo- - 02c 02c Team Ongo April 25, 2007 April 25, 2007 Client: Iowa Space Grant Consortium Client: Iowa Space Grant Consortium

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SLIDE 1

Spacecraft Systems Operations Lab: Spacecraft Systems Operations Lab:

Radio Telescope Radio Telescope

Team Ongo Team Ongo-

  • 02c

02c April 25, 2007 April 25, 2007 Client: Iowa Space Grant Consortium Client: Iowa Space Grant Consortium Advisor: Dr. Basart Advisor: Dr. Basart

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SLIDE 2

Team Members Team Members

Second Sem ester Second Sem ester Students Students: :

  • Joel Leyh (EE)

Joel Leyh (EE)

  • Ehsan Rehman (EE)

Ehsan Rehman (EE) First Sem ester First Sem ester Students Students: :

  • Nick Jensen (

Nick Jensen ( CprE CprE) )

  • Sulianet Ortiz (EE)

Sulianet Ortiz (EE)

  • Raj Venkatachalam (EE)

Raj Venkatachalam (EE)

  • Niclo Hitchcock (EE)

Niclo Hitchcock (EE)

Fick Observatory

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SLIDE 3

Presentation Outline Presentation Outline

  • Definitions

Definitions

  • Acknowledgements

Acknowledgements

  • Problem Statement

Problem Statement

  • Operating Environment

Operating Environment

  • Intended Users and

Intended Users and Uses Uses

  • End Product

End Product

  • Assumptions and

Assumptions and Limitations Limitations

  • Accomplishments

Accomplishments

  • Project Activities

Project Activities

  • Resource Requirements

Resource Requirements

  • Lessons Learned

Lessons Learned

  • Closing Summary

Closing Summary

Radio Telescope

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SLIDE 4

List of Definitions List of Definitions

DAQ: Data acquisition (input/output from computer) Shaft angle encoder: Electro-mechanical device used

to convert the angular position

  • f a shaft or axle to a digital code

Azimuth: The measurement of the

horizontal movement of the dish

Elevation: The measurement of the

vertical movement of the dish

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SLIDE 5

Acknowledgments Acknowledgments

Financial support:

  • Iowa Space Grant Consortium
  • Dr. John Lamont and Prof. Ralph Patterson III

Advising:

  • Dr. John P. Basart
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SLIDE 6

Problem Statement Problem Statement

Conversion of satellite tracking equipment into a radio

telescope at the Fick Observatory in Boone, IA

Telescope needs to be operable from a remote location, via

the Internet

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SLIDE 7

Operating Environment Operating Environment

Amplification system is to be placed outdoor where

temperatures ranges from -20°F to 110°F with possibility of snow, ice and strong wind

Vulnerability to lightning which could lead to signal

interference and equipment damage

Remaining part of the system will be held indoors at

regular room temperature

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SLIDE 8

Intended Users and Uses Intended Users and Uses

Intended Users: Intended Users:

  • Faculty and researchers in astronomy

Faculty and researchers in astronomy

  • Astronomy students

Astronomy students

Intended Uses: Intended Uses:

  • Radio mapping of the sky at frequency

Radio mapping of the sky at frequency around 1420 MHz around 1420 MHz

  • Tracking celestial objects

Tracking celestial objects

  • Data collection

Data collection

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SLIDE 9

End Product Description End Product Description

408 MHz 1420 MHz 10 GHz

A radio telescope to be used by the ISU community that can accurately track & record data from celestial objects with remote operation capabilities.

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SLIDE 10

Assumptions & Limitations Assumptions & Limitations

Assumptions: Assumptions:

  • 1420 MHz is an appropriate frequency for

1420 MHz is an appropriate frequency for radio astronomy radio astronomy

  • Dish will pick up relevant signals

Dish will pick up relevant signals

  • Motors and gearboxes are capable of

Motors and gearboxes are capable of precise movement precise movement

  • The software and hardware developed in

The software and hardware developed in previous semesters work as intended previous semesters work as intended

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SLIDE 11

Assumptions & Limitations Assumptions & Limitations

Limitations: Limitations:

  • Dish unable to be positioned to true north

Dish unable to be positioned to true north

  • Positioning accuracy dependant on motors and

Positioning accuracy dependant on motors and gears gears

  • Radio sources less than 2.5 degrees apart

Radio sources less than 2.5 degrees apart appear as one source due to beam width of appear as one source due to beam width of the dish the dish

  • Weather conditions limit the work that can be

Weather conditions limit the work that can be done on the exterior components of the dish done on the exterior components of the dish

  • The dish, mount and other fixtures are

The dish, mount and other fixtures are irreplaceable irreplaceable

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SLIDE 12

Niclo Hitchcock Niclo Hitchcock

  • Definitions

Definitions

  • Acknowledgements

Acknowledgements

  • Problem Statement

Problem Statement

  • Operating Environment

Operating Environment

  • Intended Users and Uses

Intended Users and Uses

  • End Product

End Product

  • Assumptions and Limitations

Assumptions and Limitations

  • Accomplishments

Accomplishments

  • Project Activities

Project Activities

  • Attenuator and Remote Control Software

Attenuator and Remote Control Software

  • Position Sensing

Position Sensing

  • Scanning and positioning software improvements

Scanning and positioning software improvements

  • Motor control automation

Motor control automation

  • Resource Requirements

Resource Requirements

  • Lessons Learned

Lessons Learned

  • Closing Summary

Closing Summary

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SLIDE 13

Previous Accomplishments Previous Accomplishments

  • Installation of dish, motors and other mechanical

Installation of dish, motors and other mechanical fixtures fixtures

  • Major electrical work for motors and positioning

Major electrical work for motors and positioning system system

  • Purchase of radio receiver system

Purchase of radio receiver system

  • Preliminary software for operating the telescope

Preliminary software for operating the telescope

  • Impedance matching

Impedance matching

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SLIDE 14

Current Accomplishments Current Accomplishments

  • Programmable attenuator installation and

Programmable attenuator installation and software design software design

  • Remote Control Software design

Remote Control Software design

  • Motor control box reorganization

Motor control box reorganization

  • Line driver for positioning system

Line driver for positioning system

  • Scanning and positioning software improvements

Scanning and positioning software improvements

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SLIDE 15
  • The previous semester noticed a problem when

The previous semester noticed a problem when the sun was scanned, in which the intensity the sun was scanned, in which the intensity dropped to zero. The signal was overpowering dropped to zero. The signal was overpowering the receiver. An attenuator was required to the receiver. An attenuator was required to prevent this. prevent this. Before After 3dB attenuation

Project Activities Project Activities

Attenuator Attenuator

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SLIDE 16
  • The attenuator must be operable remotely, so

The attenuator must be operable remotely, so that users can prevent signal from clipping at that users can prevent signal from clipping at peak intensities. This can be accomplished using peak intensities. This can be accomplished using a LabVIEW virtual instrument. a LabVIEW virtual instrument.

Project Activities Project Activities

Attenuator Attenuator

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SLIDE 17

Project Activities Project Activities

Attenuator Attenuator

  • The software uses LabVIEW components to

The software uses LabVIEW components to

  • perate DAQ card, which sends appropriate
  • perate DAQ card, which sends appropriate

signals to the attenuator inputs. signals to the attenuator inputs.

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SLIDE 18

Project Activities Project Activities

Remote Control Software Remote Control Software

  • The attenuator software has been integrated into

The attenuator software has been integrated into additional software which allows dish components additional software which allows dish components to be activated remotely to be activated remotely

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SLIDE 19

Project Activities Project Activities

Remote Control Software Remote Control Software

  • The remote control software operates under the

The remote control software operates under the same principles as the attenuator software to same principles as the attenuator software to control relays using the DAQ card control relays using the DAQ card

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SLIDE 20

Ehsan Rehman Ehsan Rehman

  • Definitions

Definitions

  • Acknowledgements

Acknowledgements

  • Problem Statement

Problem Statement

  • Operating Environment

Operating Environment

  • Intended Users and Uses

Intended Users and Uses

  • End Product

End Product

  • Assumptions and Limitations

Assumptions and Limitations

  • Accomplishments

Accomplishments

  • Project Activities

Project Activities

  • Attenuator and Remote Control Software

Attenuator and Remote Control Software

  • Position Sensing

Position Sensing

  • Scanning and positioning software improvements

Scanning and positioning software improvements

  • Motor control automation

Motor control automation

  • Resource Requirements

Resource Requirements

  • Lessons Learned

Lessons Learned

  • Closing Summary

Closing Summary

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SLIDE 21

Project Activities Project Activities

Position Sensing Position Sensing Problem: Problem:

  • Current positioning system based on potentiometers

Current positioning system based on potentiometers

  • Output is an analog signal which is susceptible to

Output is an analog signal which is susceptible to various forms of electrical noise various forms of electrical noise

  • Inaccuracy is directly proportional to higher

Inaccuracy is directly proportional to higher resolutions resolutions

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SLIDE 22

Model of Radio Telescope Model of Radio Telescope

Potentiometers DAQ Card Noise

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SLIDE 23

Solution Solution -

  • Shaft Angle Encoder

Shaft Angle Encoder

  • Shaft Angle Encoder

Shaft Angle Encoder -

  • An

An electro electro-

  • mechanical

mechanical sensing device used sensing device used to convert the to convert the angular angular position to a digital position to a digital code code

  • Noise reduction

Noise reduction -

  • Digital output less prone to

Digital output less prone to noise noise

  • Higher resolution

Higher resolution

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SLIDE 24

Alternate Solution Alternate Solution -

  • Line Driver

Line Driver

  • Transmission Line noise reduction

Transmission Line noise reduction

  • Advantages over Shaft Angle Encoder

Advantages over Shaft Angle Encoder – – Saves $$ Saves $$

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SLIDE 25

Modified Model of Radio Telescope Modified Model of Radio Telescope

Potentiometers DAQ Card Noise

Unity Buffer Diff-Amp

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SLIDE 26

Nick Jensen Nick Jensen

  • Definitions

Definitions

  • Acknowledgements

Acknowledgements

  • Problem Statement

Problem Statement

  • Operating Environment

Operating Environment

  • Intended Users and Uses

Intended Users and Uses

  • End Product

End Product

  • Assumptions and Limitations

Assumptions and Limitations

  • Accomplishments

Accomplishments

  • Project Activities

Project Activities

  • Attenuator and Remote Control Software

Attenuator and Remote Control Software

  • Position Sensing

Position Sensing

  • Scanning and positioning software improvements

Scanning and positioning software improvements

  • Motor control automation

Motor control automation

  • Resource Requirements

Resource Requirements

  • Lessons Learned

Lessons Learned

  • Closing Summary

Closing Summary

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SLIDE 27

Step Backwards Step Backwards

  • Failed Capacitors caused computer to restart

Failed Capacitors caused computer to restart during each request of the DAQ card during each request of the DAQ card

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SLIDE 28

Project Activities Project Activities

Scanning and positioning software improvements Scanning and positioning software improvements Problem: Problem:

  • Positioning software thought to be inaccurate

Positioning software thought to be inaccurate

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SLIDE 29

Live Live Video Feed Video Feed

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SLIDE 30

Project Activities Project Activities

Scanning and positioning software improvements Scanning and positioning software improvements Implementation: Implementation:

  • Verify astronomical equations in positioning

Verify astronomical equations in positioning software software

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SLIDE 31

Sulianet Ortiz Sulianet Ortiz

  • Definitions

Definitions

  • Acknowledgements

Acknowledgements

  • Problem Statement

Problem Statement

  • Operating Environment

Operating Environment

  • Intended Users and Uses

Intended Users and Uses

  • End Product

End Product

  • Assumptions and Limitations

Assumptions and Limitations

  • Accomplishments

Accomplishments

  • Project Activities

Project Activities

  • Attenuator and Remote Control Software

Attenuator and Remote Control Software

  • Position Sensing

Position Sensing

  • Scanning and positioning software improvements

Scanning and positioning software improvements

  • Motor control box

Motor control box

  • Resource Requirements

Resource Requirements

  • Lessons Learned

Lessons Learned

  • Closing Summary

Closing Summary

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SLIDE 32

Project Activities Project Activities

Motor control box Motor control box Automation Problems: Automation Problems:

  • Power is manually controlled at location

Power is manually controlled at location

  • 20 minute drive away

20 minute drive away

  • Space to implement new circuitry is non

Space to implement new circuitry is non-

  • existent

existent

  • 10 inches deep

10 inches deep

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SLIDE 33

Re-allocated components:

Voltage regulation

board

Coax switch

actuator

Limit switch relay Wires connecting

to front panel

Wires connecting

to computer

Project Activities Project Activities

Motor control box Motor control box

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SLIDE 34

Project Activities Project Activities

Motor control box Motor control box

Approaches considered: Approaches considered:

  • Leave power on continuously

Leave power on continuously

  • Automate power supply via four relay

Automate power supply via four relay circuit boards circuit boards

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SLIDE 35

Project Activities Project Activities

Motor control box Motor control box

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SLIDE 36

Raj Raj Venkat Venkat

  • Definitions

Definitions

  • Acknowledgements

Acknowledgements

  • Problem Statement

Problem Statement

  • Operating Environment

Operating Environment

  • Intended Users and Uses

Intended Users and Uses

  • End Product

End Product

  • Assumptions and Limitations

Assumptions and Limitations

  • Accomplishments

Accomplishments

  • Project Activities

Project Activities

  • Attenuator and Remote Control Software

Attenuator and Remote Control Software

  • Position Sensing

Position Sensing

  • Scanning and positioning software improvements

Scanning and positioning software improvements

  • Motor control box

Motor control box

  • Resource Requirements

Resource Requirements

  • Lessons Learned

Lessons Learned

  • Closing Summary

Closing Summary

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SLIDE 37

Schedule Schedule

Task Name Duration Remote Motor Control Box 0 day s Testing 30 day s Implementation 35 day s Documentation 16 day s Raster Scan 0 day s Modif ication 45 day s Documentation 7 day s Line Driver 0 day s Research 21 day s Design 7 day s Implementation 21 day s Documentation 7 day s Positioning Software 0 day s Modif ication 45 day s Documentation 7 day s A ttenuator Hardware 0 day s Research 7 day s Implementation 21 day s Documentation 7 day s A ttenuator Software 0 day s Research 21 day s Implementation 35 day s Documentation 7 day s Website 80 day s Maintenance of Fick 7 day s Documentation 0 day s Organize Documents 7 day s Operation Procedure 7 day s 2/8 2/8 2/8 2/8 2/8 2/8 2/8 24 31 7 14 21 28 4 11 18 25 4 11 18 25 1 8 15 22 29 6 13 20 Jan '07 Feb '07 Mar '07 Apr '07 May '07

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SLIDE 38

Personal Effort Personal Effort

5 8 9 hours 99 99 100 95 95 101

Estim ated

4 1 6 hours Sem ester Total 96 Niclo Hitchcock 85 Nick Jensen 68 Sulianet Ortiz 63 Raj Venkatachalam 60 Ehsan Rehman 72 Joel Leyh

To Date Mem ber

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SLIDE 39

Financial Budget Financial Budget

$ $200.0 $140.00 $110.0 Enclosure $575.00 $550.0 Motherboard

$120.00

$90.00 Power Supplies (2) $4,347. 67 Previous School Sessions Parts and Materials: With Labor W/ O Labor Item

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SLIDE 40

Project Evaluation Project Evaluation

70% 100% Total 3.75% 75% 5% Website maintenance 2% 20% 10% Positioning Software 2% 20% 10% Raster Scan 14.25% 95% 15% Attenuator Software 13.5% 90% 15% Attenuator Hardware 14% 70% 20% Motor Control Box 11.25% 75% 15% Line Driver 9% 90% 10% Teaching LabVIEW to new students

Resultant Score Evaluatio n Score Relative I m portan ce Milestones

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SLIDE 41

Future Required Activities Future Required Activities

Integrate an automated power management

solution

Combine all software into a user-friendly web-

based interface

Calibrate system for accurate positioning Continue improving software interactivity with

hardware

Continue improving wiring of motor control box

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SLIDE 42

Lessons Learned Lessons Learned

  • Technical:

Technical:

  • Positioning system of the dish

Positioning system of the dish

  • Noise and line drivers

Noise and line drivers

  • Attenuation of signal

Attenuation of signal

  • LabVIEW concepts and standards

LabVIEW concepts and standards

  • Non

Non-

  • Technical:

Technical:

  • The importance of team planning and

The importance of team planning and communication communication

  • Making decisions as a group

Making decisions as a group

  • Importance of clear and concise documentation

Importance of clear and concise documentation

  • Importance of time and task management

Importance of time and task management

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SLIDE 43

Risks & Risk Management Risks & Risk Management

Risk of shock or electrocution while

working on the motor control box

  • Power should be disconnected before

beginning work

Loss of software or any vital data for the

project

  • Regularly create backups

Loss of team member

  • Obtain information about his/ her activities

from their log book

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SLIDE 44

Closing Summary Closing Summary

This semester we have been working on : This semester we have been working on :

  • Improving wiring and layout of the motor

Improving wiring and layout of the motor control system control system

  • Building and integrating the relay system for

Building and integrating the relay system for remote activation of the control box remote activation of the control box

  • Installing an attenuator and developing

Installing an attenuator and developing software to run it software to run it

  • Resolving errors related to the positioning of

Resolving errors related to the positioning of the dish the dish

Upon completion of this project, the dish at Upon completion of this project, the dish at Fick Observatory will track and record data Fick Observatory will track and record data

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SLIDE 45

Questions?

SSOL: Radio Telescope Team Ongo-02c