LSU 06/23/04COSPAR 2004, HASP Presentation1 The High Altitude Student Platform (HASP) for...

LSU 06/23/04 COSPAR 2004, HASP Presentation 1

The High Altitude Student Platform (HASP) for Student-Built

Payloads

T.G. Guzik and J.P. WefelDept. of Physics & Astronomy

Louisiana State UniversityBaton Rouge, LA U.S.A.


Student-Built Payload Limitations

• Many higher education institutions across U.S. are engaging students in design, construction and operation of aerospace payloads (See ACES presentation, this conference)

– Small payloads launched on sounding balloons

– Compact Earth-orbiting satellites

• Development life cycle needs to be limited to one year to conform with student schedule– Feasible with small sounding balloon payloads

– Difficult for satellites where launch schedule is uncertain, but could be flight tested on a balloon


Sounding Balloon Limitations

• Sounding balloons have limited “hang time”– Total flight time about 2

½ hours– Time above 24 km about

½ hour

• Inappropriate for testing student-built satellites or new technologies– At most only cursory evaluation of power,

data acquisition & telemetry subsystems– No test of day-night thermal cycling


HASP Addresses These Issues

• Support & flight test multiple student built payloads– Altitude > 36 km, duration of ~20 hours

• Make use of NASA National Scientific Balloon Facility (NSBF) experience

• Provide standard power, data, mechanical interface

• Use CubeSat model for design– Developed by Stanford and CalPoly– Size is 10 cm cube– Max weight is 1 kg– Power is ~650 mW


Configuration & Structure

• Core aluminum frame provides platform integrity– Mounting for flight data / control systems– Attachment for swivel harness and ballast hopper– Composite braces to support student payloads


Concept Student Payload Interface• Mounting plate consistent with

CubeSat model– Held at corner beams so faces are

unobstructed– Mounting plate includes power

& data interface– Can be sent to institution for pre-

integration

• Alternate mounting is also possible– Specify hole pattern on support braces

– Heavier payloads could be mounted on top of Al structure

• ICD determined during student payload application


Weight & Size

• HASP dimensions– Core frame is 112 cm (44”)

by 91.5 cm (36”) by 51 cm (20”) tall

– Student payload braces extend 112 cm away from frame

– Total dimensions are, thus, ~3.4 m x 3.2 m x 0.5 m

• Weight determined mostly by measured values– Total is 211 kg (465 lbs)

HASP Weight Budget

Component Weight (kg)

Fight Control Unit 2.3

Data Archive Unit 2.3

FCU, DAU Vessel 18.1

Data Hard Disk 9.1

Auxiliary XTM 2.3

Student Payloads 8.2

Cabling 13.6

Thermal Insulation 13.6

Batteries 9.1

Structure 68.9

CIP 27.2

Contingency 36.3

Total 211


Command and Control• Heritage from ATIC scientific balloon payload systems

– Directly adopt flight proven hardware and software design• Flight Control Unit (FCU)

– Handles commands– Monitors power system– Serial link with payloads– Collects status information

• Data Archive Unit (DAU)– On-board data recording

– LOS transmission of HASP & student payload data to ground at rate up to ~ 300 kilobits per second

• NSBF supplied CIP controls balloon systems


FCU Hardware

Flight Control Unit front (left) and back (right) flown on the ATIC-02 experiment from December 29, 2002 to January 18, 2003


DAU Hardware

Data Archive Unit (left) and Hard Disk Pressure Vessel (right) flown on the ATIC-02 experiment from December 29, 2002 to January 18, 2003


Power System• Route 28V buss and convert power locally• Power budget from measured values & includes an 80%

efficiency factor• 24 hour lifetime with two 10 cell lithium battery packs

HASP Power Budget

Component V A W

FCU 5 3.5 17.5

DAU 5 3.9 19.5

Aux XTM 5 1.3 6.5

Data Disk5 0.8 4.0

12 1.3 15.6

StudentPayloads

5 0.3 1.5

3.6 1.4 5.1

Total 69.7


Anticipated Flight Operations• Flight Ops take place at NSBF or Ft. Sumner

• Initially HASP is setup & integrated with NSBF systems

• Student payload integration & testing follows

• Launch tries to target “turn-around” conditions


Summary• The High Altitude Student Platform supports advanced student-

built payloads– Regular schedule of launches at least once per year– Provide high altitude (~36 km) and reasonable duration (~15 to 20 hours)– Flight test student-built satellite– Fly payloads too heavy for sounding balloons

• Existing flight designs and experience minimize cost of development and operation– Hardware / software from flight proven ATIC payload– Use time-tested NSBF balloon vehicle hardware– Capitalize on decades of NSBF experience with flight operations

• Could be easily adapted for LDB (~15 – 30 days) flights• Could become major part of Aerospace Workforce Development

LSU 06/23/04COSPAR 2004, HASP Presentation1 The High Altitude Student Platform (HASP) for...

Documents

Transcript of LSU 06/23/04COSPAR 2004, HASP Presentation1 The High Altitude Student Platform (HASP) for...