Panoramic Space Pictures

Critical Design ReviewUniversity of Southern

ColoradoApril 2003

Veronica GarciaBecki KeatorShayne CastroFrancisco Moran

Mission Description

We are going to build a satellite that will be able to take panoramic pictures. A balloon will take our satellite up to approximately one hundred thousand feet, and we will take pictures during the entire flight. The satellite will have four cameras placed inside the shell to capture 360° images. All this weighing no more than 1.4 kg.

Mission Goals and NASA Benefits

Our goal is to take pictures at different altitudes by setting the cameras off with an interval timing circuit every five and a half minutes once its in the air. This will assist NASA in real time mission planning in finding a secure place to land spacecrafts on other planets. This will also help gather more information about the atmosphere at different altitudes.

System Requirements

Satellite stays attached to the tether during the entire mission. To prevent equipment (cameras, interval timer, batteries) from freezing we have to insulate the whole system. Stabilization of the satellite in order to have clear images.

Subsystem Description

We have six subsystems which form our payload. These are the shell, the cameras, an interval timer, a power source, insulation, and a stabilizer.

Shell

The shell will house all the other subsystems; The cameras, batteries, interval timer, stabilizer, and insulation. It will protect them from the changing environment as the balloon elevates and descends. Cushion the landing so we do not lose the images taken during the mission.

Shell Requirements

Our payload will be built out of a ¼’’ foam core sheet to have a light and durable design. Aluminum tape for extra strength. The shell has no inputs or outputs, but all the other systems depend on it.

Hardware components of Shell

¼’’ foam core sheetAluminum tapeAdhesive (liquid nails)Warning label

Cameras

Panoramic images will be recorded at different altitudes at 360° We will use the Elph Lt advantix camera with a panoramic lens to capture the image needed.

Camera Specifications

Shooting distance : 0.6m to infinite. Shutter : Combination aperture and program electromagnetic drive shutter.Time and date will be recorded on each picture.

Camera Requirements

3V power to operate each camera.Timer to tell the camera when to take pictures.Insulation to prevent freezing of the components and condensation of the lens.Stabilizer to have clear images.

Hardware Components of camera

Panoramic lens Lithium BatteriesInterval TimerAdvantix Film                                                                         

Interval Timing Circuit

The entire purpose is to activate the shutter of the four cameras at the same time to ensure 360° images at the same elevations.

Velleman Interval Timer Specifications

Output relay with dry switch-over contact : 3A/24V Pulse time adjustable : between 0.5 and 5s Pause time adjustable : between 2.5 and 60s Dimensions : 40 x 85mm (1.6" x 3.4")

Timer Requirements

Power supply : 12VDC / 100maWe will get the required voltage and amps by a series circuit that consists of a 9V and a 3 V battery.Must be programmed to set the cameras off every five and a half minutes.

Functional Diagram of Interval Timer

Power Source

Provide separate power sources for cameras, motor, and timer so they can perform their individual functions.

Power Source Requirements

Keep batteries warm to prevent them from freezing. Test the batteries to know the freezing and explosion points to minimize the probability of failure.

Insulation

This prevents our other subsystem from freezing and it will provide cushion for landing.This will also provide the support for the cameras.Styrofoam will be the insulator that we will use.

Stabilization

The stabilization helps to reduce the movement of the load so it can take higher quality pictures. For this project we will use a gyroscope.

Requirements of the Stabilizer

The gyroscope will require a High Speed 12VDC Hobby Motor. We will get the required voltage and amps by a series circuit that consists of a 9V and a 3 V battery.This motor will spin the gyroscope at approximately 15,000 RPM.

Functional Diagram of the Gyroscope

Mass Budget

(4) Cameras (batteries / film) 672gShell 200gBattery packs 97gGyroscope 100gInterval Timer 30g

Total 1.1kgLimit 1.4kg

Power Budget

(4) Cameras 12VGyroscope 12VInterval Timer 12V

Total 36V

Project Organization

V e ro n ica G a rc iaS truc tu re s Le ad

F ra n c isco M o ranH a rdw a re L e ad

B e ck i K e a to rP o w e r Le ad

S h a yn e C a s troL ead

BudgetCameras (4) $ 300.00Aluminum Tape $ 5.00Shell $ 3.00Interval Timer $ 15.00Batteries $ 10.00Electrical tape $ 3.00Styrofoam $ 15.00Hobby Motor (gyroscope) $ 5.00Adhesive $ 4.00Total $360.00

ScheduleTask Duration Start Finish Person responsible

PDR 10 3-Mar 14-Mar -Finalize Design 15 10-Mar 28-Mar -

Cameras 14-Mar 31-Mar FranciscoPower 14-Mar 31-Mar BeckiStabilizer 14-Mar 31-Mar ShayneMass and power budgets 14-Mar 31-Mar VeronicaPresentation of PDR to the chapter of PE's 1 2-Apr 2-Apr -

Prepare for CDR 4 31-Mar 3-Apr -Check for any changes 3-Apr 3-Apr -

CDR 0 4-Apr 4-Apr -Build Subsystems 14 14-Apr 1-May -

shell 2 14-Apr 16-Apr Veronicainterval timer 2 17-Apr 19-Apr Francisco and Shayneconect cameras 2 20-Apr 22-Apr Franciscoinsulation 2 23-Apr 25-Apr Veronica and Beckistabilizer 2 26-Apr 28-Apr Shayneconect power 2 29-Apr 1-May Becki

subsystems complete 0 2-May 2-May -subsystems final testing 5 5-May 9-May -

subsystems enviromental testing 5 5-May 9-May -Drop test 1 5-May 5-May Becki, VeronicaFreeze test 1 6-May 6-May Shayne, VeronicaVacum test 1 7-May 7-May Shayne, Francisco

integration 30 12-May 20-Jun -

Schedulesystem env. Testing 5 23-Jun 27-Jun -

Drop test 1 23-Jun 23-Jun Becki, VeronicaFreeze test 1 24-Jun 24-Jun Shayne, VeronicaVacum test 1 25-Jun 25-Jun Shayne, Francisco

fixing env testing 5 30-Jun 4-Jul -shell 1 30-Jun 30-Jun VeronicaTimer 1 1-Jul 1-Jul Francisco and ShayneCameras 1 1-Jul 1-Jul FranciscoInsulation 1 2-Jul 2-Jul Veronica and BeckiStabilizer 1 3-Jul 3-Jul ShaynePower 1 4-Jul 4-Jul Becki

system env. Testing 3 7-Jul 9-JulDrop test 1 7-Jul 7-Jul Becki, VeronicaFreeze test 1 8-Jul 8-Jul Shayne, VeronicaVacum test 1 9-Jul 9-Jul Shayne, Francisco

Mission simulations 9 7-Jul 17-Jul -MRR 0 18-Jul 18-Jul -

mission simulations 7 21-Jul 29-Jul -Prepare for Launch 2 30-Jul 31-Jul -

LRR 0 1-Aug 1-Aug -Launch 0 2-Aug 2-Aug -

Thank you for your timeAre there any questions or

suggestions?