international space station...• some information was obtained from the nasa science and technical...
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INTERNATIONAL SPACE STATIONINTERNATIONAL SPACE STATIONSummary of Platform
Specifications
Arvid Croonquist JPL/CaltechArvid Croonquist, JPL/CaltechNov. 12, 2009
The research described in this presentation was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.
This document does not contain export-controlled information.
Copyright 2009 California Institute of Technology. Government sponsorship acknowledged.
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Topics
• ISS Overview• General FeaturesGeneral Features• Specific Locations• Environments
– Natural– Programmatic
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ISS Overview
Exposed Logistics Carriers (ELC) - ~ 6 of 72 sites
Columbus Exposed Payload Facility
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Columbus Exposed Payload Facility (CEPF) - 2 of 4 sites Japanese Experiment Module-Exposed Facility
(JEM-EF, Kibo) - ~ 5 of 10 sites
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General Features
• 51.6° orbit, 91‐minute period
• 340 – 440 km altitude
• Oriented for orbital stability– Station oriented to Earth mostly
– Solar Panels/Radiators pointed to/away from the Sunp y
• Pointing Accuracy– +0.08° for roll & pitch and +0.23°/‐0.02° yaw (bending of truss)
• Communications with EarthCommunications with Earth– via TDRSS, : ~ 90%
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Columbus External Payload Facility (CEPF)
• 4 external sites (2 available to NASA)• 0.86m x 1.2m baseplate x 1.2m tallp• Mass < 227 kg
• Standard attachmentmechanism
• Actuatable by crew or robotic tools
• 120Vdc, 1,250WMIL STD 1553B 10Mb
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• MIL-STD-1553B, 10Mbps Ethernet
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ExPRESS Logistics Carrier
• 6 ELC sites, 2 Science Payloads/ELC• Same envelope, mass, services as CEPF• ELC were integrated on the ground• Payloads can be removed & replaced on orbit
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ExPRESS Logistics Carrier
S3P3
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Kibo: Japanese Experiment Module – Exposed Facility
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JEM‐EF Payload
• Unique interfaces– To JEM‐EF (Payload Interface Unit)( y )
– To launch vehicle (Payload Attachment Mechanism)
– To ISS Arm (Grapple Fixture)
M• Mass– Nominal: 500 kg
– Heavy: 2,500 kg (2 sites)
• 120 Vdc; 3,000W
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MAXI – JEM‐EF Payload
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ISS Locations: Summary
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Environment
• Thermal– 3K sink, 1420 W/m2
• Contamination• Contamination– < 1 μg/cm/year
• Radiation– trapped protons Galactic Cosmic Raystrapped protons, Galactic Cosmic Rays
• Orbital debris & meteroids
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Programmatic Environment
Payload Integration (ISS Payloads Office, Code OZ)• Formal “3‐year” development processFormal 3 year development process
• Safety Process– Driven by launch vehicle
– Generic & unique hazards (pressure vessels lasers batteries)Generic & unique hazards (pressure vessels, lasers, batteries)
• Launch Services– At no cost to Payload Developer
• Analytic Integration• Analytic Integration
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SummaryAb th t hAbove the atmosphere
but ISS carries its ownLong-duration mission
in 30-minute snipsM i t t iMass is not at a premium
only small envelopesYou don’t have to coordinate launch
but you have to worry about it laterU b t t d ith iUnobstructed zenith views
most of the time
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Acknowledgement
• Much of this presentation was derived from a presentation by Gene Cook (ISS Payloads Office) in December 2007 titled “ISS Unpressurized Payload Accommodations” <www.nasa.gov/pdf/206852main_SMEX_Presentations_website.pdf>
• Some information was obtained from the NASA Science and Technical Information Program Office document, “Overview of Attached Payload Accommodations and Environments on the International Space Station” (Nov 2007) , <http://www.nasa.gov/pdf/190373main_TP‐2007‐214768.pdf>
• The photographs were obtained from the Web
• Additional information can be obtained • For Columbus Exposed Payload Facility from:p y y
www.spaceflight.esa.int/users/downloads/userguides/colaccom.pdf
• For JEM Exposed Facility from:
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http://idb.exst.jaxa.jp/edata/02110/199810K02110040/199810K02110040.html
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Backup Slides
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Backup: Accelerations
• 0.2‐g, 15‐minute reboost
• 2 micro‐g quasistatic accelerationg q
• Dynamic vibration environment
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Backup: CEPF Payloads
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Backup: CEPF Payload Fields of View
‐Z: toward zenith
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Backup: ELC Payload Fields of View
‐Z: toward zenith
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Backup: JEM‐EF Payload Fields of View
‐Z: toward zenith
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Backup: Launch Opportunities
• Space Shuttle
• HTV• HTV
• SpaceX/Falcon 9/Dragon
HII‐A Transfer Vehicle
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Dragon
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Backup: Accommodation Hardware
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Backup: ISS Communications
• All NASA payloads use NASA communication resources• Ground communications with Payload Operations are via Internet
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Add URLs
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Backup: Alpha Magnetic Spectrometer
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