trio-cinema meeting at khu 1 october 19-23, 2009 cinema operations manfred bester
TRANSCRIPT
TRIO-CINEMA Meeting at KHU 1 October 19-23, 2009
CINEMA Operations
Manfred Bester
TRIO-CINEMA Meeting at KHU 2 October 19-23, 2009
Outline
• Outline− CINEMA Concept of Operations− Operations Heritage at UCB/SSL− Communications Options− Ground Systems Requirements− Ongoing Work− Student Involvement in Operations
TRIO-CINEMA Meeting at KHU 3 October 19-23, 2009
CINEMA Concept of Operations
• CINEMA Concept of Operations− Mission Orbit
Spin-stabilized spacecraft
Baseline orbit 650 km circular at 72° inclination
− Pass Coverage
Typically 4 passes/day with 30 min access time
Tracking via TLEs downloaded from USSTRATCOM
− Data Recovery
Store-and-forward scheme, downlink at 1 Mbps
Recoverable science data volume 760 Mbits/day
− Ground Segment
MOC and ground station located at UCB/SSL
Look into using heritage control system (ITOS)
TRIO-CINEMA Meeting at KHU 4 October 19-23, 2009
FAST 1996-2009
THEMIS Since 2007
RHESSI Since 2002
EUVE 1992-2001
CHIPS 2003-2008
NuSTAR Launch 2011
Flight Operations History at UC Berkeley’s
Space Sciences Laboratory
4
Operations History at UCB/SSL
TRIO-CINEMA Meeting at KHU 5 October 19-23, 2009
Flight control consoles at the multi-mission MOC
5
CINEMA can leverage strong heritage of an existing multi-mission MOC
Many internal MOC systems and interfaces required for CINEMA are functional already
High degree of systems automation is employed for reliable lights-out operations
New interfaces required for CINEMA depending upon telecommunications trades
All operational interfaces are carefully exercised during pre-launch testing
Multi-mission Operations Center at UCB/SSL
TRIO-CINEMA Meeting at KHU 6 October 19-23, 2009
Original CINEMA Ground Track
TRIO-CINEMA Meeting at KHU 7 October 19-23, 2009
Communications Options
• Communications Options− Telecom Trades
− Frequency band selection− Flight transceivers− Flight antennas− Flight software− Ground hardware & software
− Ground Stations− BGS 11m− Others
− Link Budgets− NASA style S-band links and WiFi S-band links
− Spectrum Licensing− Government, commercial or amateur radio
TRIO-CINEMA Meeting at KHU 8 October 19-23, 2009
Telemetry & Command Data Formats
• Telemetry & Command Data Formats− CCSDS Standard
− Packet layer− Transfer frame layer− Coding layer with Reed Solomon error correction − UCB has in-house heritage− Various tools in place to process data
− AX.25 Standard− Useful for low rate house keeping and command data transfer− May be alternative for UHF/VHF links− Can be implemented at the MOC
TRIO-CINEMA Meeting at KHU 9 October 19-23, 2009
Engineering TLM/CMDS-band2400-2450 MHz
Science TLMS-band2200-2300 MHz
CINEMA
MOC at UCB/SSL
S-band Communications Concept
BGS 11m Antenna
TRIO-CINEMA Meeting at KHU 10 October 19-23, 2009
Engineering TLM/CMDUHF/VHF440/145 MHz
Science TLMS-band2200-2300 MHz
CINEMA
MOC at UCB/SSL
Multi-band Communications Concept
BGS 11m Antenna
TRIO-CINEMA Meeting at KHU 11 October 19-23, 2009
NASA Style S-Band Link
• NASA Style S-Band Link− Transceiver options: SpaceQuest, Emhiser
− Heritage: CHIPSAT, various others
− Spectrum licensing: Need government license
− Trades: Can use BGS “as is”
High link margin
Low risk
SpaceQuest TX-2400 Transmitter
TRIO-CINEMA Meeting at KHU 12 October 19-23, 2009
WiFi S-Band Link
• WiFi S-Band Link− Transceiver options: MicroHard
− Heritage: GENESAT
− Spectrum licensing: Need amateur radio license
− Trades: Reuse existing flight hardware and software
Unknown impact of local WiFi
interference
MicroHard MHX-2400 Transceiver
TRIO-CINEMA Meeting at KHU 13 October 19-23, 2009
S-Band Prototype Antennas
• First Prototype Model− Linear polarized patch antenna
Overall Dimensions 70.2 x 70.2 mm2
− Fabricated first antenna prototype at SSL
Need to optimize design further
Goal is circular polarized antenna
− Test with BGS 11-m antenna in far field
TRIO-CINEMA Meeting at KHU 14 October 19-23, 2009
Commercial S-Band Antennas
• Spectrum Control− Provides patch antenna elements− Various frequency bands (900 MHz – 5.8 GHz)− Circular polarization
TRIO-CINEMA Meeting at KHU 15 October 19-23, 2009
S-Band Flight Antennas
• Flight Models− Circular polarized patches:
Need 4− Typical gain pattern:
Hemispherical with taper− Performance goals
See table below
Patch Antenna Performance Goals
Parameter θ = 90° θ = 30° θ = 5°
Efficiency > 80% > 80% > 80%
Gain > 7 dBic > 0 dBic > -10 dBic
Axial Ratio < 1 dB < 6 dB < 10 dB
TRIO-CINEMA Meeting at KHU 16 October 19-23, 2009
Ground Systems Requirements
• Ground Systems Requirements− Mission Operations
− Ground control system− Mission planning products− Sequence table generation− State-of-health monitoring− Spacecraft command and control− Ground station interfaces
− Science Data Processing− Download of science data− Reformatting and archiving− Data distribution to science teams− Web based interfaces
TRIO-CINEMA Meeting at KHU 17 October 19-23, 2009
Ongoing Work
• Ongoing Work− Communications Design
Trades for selection of radios ongoing
S-band antenna prototyping ongoing
Need to address spectrum licensing
− Ground Systems
Ground station options tied to selection of radios
Command & control systems
Look into CCSDS compatibility
− Develop Detailed Operations Concept
Operations scenarios
Attitude control
Day-in-the-life planning
TRIO-CINEMA Meeting at KHU 18 October 19-23, 2009
On-orbit Operations
• On-orbit Operations− Make use of rich heritage and many years of experience− Take into account lessons learned− Adapt and simplify procedures from larger missions where
appropriate− Perform detailed mission readiness testing to demonstrate
all ground systems elements and interfaces are ready− Perform simulations for launch countdown and first/second
day on orbit − Train students to successfully operate CINEMA under the
guidance of professional flight controllers− Prepare students to work on larger and more complex
missions in their future careers