IMAGE Detailed Mission Requirements (DMR)

Final - July 1998


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IMAGE 4300 -- Facility Requirements

This section defines the general facility requirements for the IMAGE SMOC. The SMOC will be located at GSFC Building 3, Room S25E.
4300.1          SMOC Hardware Requirements. Major hardware is listed by quantity below.

Unit Quantity
FEDS/DHDS 1
On-line Archive 1
Workstation (IBM RS 6000) 4
Personal Computers 6
Science Processing Workstation 2
XTERM 3
CD or DVD Writer 1
Postscript Printer 1

General Unit Space & Power Requirements.

4300.2          A total aggregate space requirement of 800 square feet
                (contiguous) is required. Below is a list of requirements by unit and
                element.

Unit Element Description Height (in.) Width (in.) Depth (in.) Remarks
SC Workstation
(IBM RS 6000)
P200
Power PC
Monitor
Processor
19
6.5
19
17
19
19
rotatable
Personal Computer Dell Monitor
Processor
20
22
19.5
8
20
18
tower
XTERM NCD-HMX Monitor
Processor
20
3
19
16
22
14
 
  7206 001 Tape Drive 3 11 11.5 stackable
Mirror Disk SCSI Bootbox Hard Drive 7.5 13.5 17 stackable
  External Hard Drive 6 10 12 stackable
Postscript Printer HP Laserjet 4M Page Printer        
FEDS/DHDS Monitor
Alpha Server
 
Processor
14.5
18.5
14.5
14
16
24
 
Science Processing
Workstation
Monitor
Alpha Server
 
Processor
14.5
18.5
14.5
14
16
24
 
CD or DVD Writer Optical Storage Data Distribution        
    Monitor 14.5 14.5 16  

4300.3         The baseline SMOC system shall require a minimum of 11 20A
               standard 110 Vac circuits.  Unit electrical power requirements 
	       are listed below.

Unit Element Description VAC A Service
SC Workstation
(IBM RS 2000)
P200
Power PC
Monitor
Processor
110
110
1.7
4.0
Single phase
Personal Computer Dell Monitor
Processor
110
110
2
5
Single phase
XTERM NCD-HMX Monitor
Processor
110
110
3
5
Single phase
  7206 001 Tape Drive 110 1 Single phase
Mirror Disk SCSI Bootbox Hard Drives 110 3 Single phase
  external Hard Drive 110 TBD Single phase
Postscript Printer HP Laserjet 4M Page Printer 110 6.4 Single phase
CD or DVD writer TBD Data Distribution 110   Single phase
Science Processing
Workstations
Alpha Server Server
Monitor
110
110
 
2
Single phase
FEDS/DHDS Alpha Server Server
Monitor
110
110
 
2
Single phase
    Monitor 110 2 Single phase

4300.4		Other facility considerations:

      4300.4.1 Heating, Ventilating and Air Conditioning (HVAC): The SMOC systems
      are free standing units requiring minimal air conditioning.  The
      temperature for the SMOC shall be between 65 and 85 degrees Fahrenheit.

      4300.4.2 Humidity: The humidity shall be between 40 and 60 percent.

      4300.4.3 Maintenance: Periodic hardware maintenance will be required for
      SMOC systems.  Software maintenance is required in support of Build
      releases and interim system releases.

SMOC voice telephone requirements are provided in Section 5000.

Response: Requirements will be met.


IMAGE 4420 -- System Operations and Maintenance

SMOC system operations shall be conducted in accordance with the schedule listed below. The SMOC shall be capable of operating in a "lights out" (unattended) mode if required.
4420.1		Ground system operations shall require a human presence of no
                more than one 8-hour shift five days per week.

4420.2		Normal Operations:
	
	       IOC (l+41 - EOM)
                 TLM: 1 hour/day, 2-45 min contacts
                 CMD: 1 hour/day, 2-45 min contacts
                 TRK: 30 minutes/day doppler (2-15 min contacts);
                      10 minutes/day ranging (2-5 min contacts)

Maintenance:

4420.3		The spacecraft flight software shall be maintained by the LMMS.

4420.4		The instrument flight software shall be maintained by the SwRI.

4420.5		Hardware and software maintenance shall be required at GSFC
                and at the launch site.

Response: Requirements will be met.


IMAGE 5000 -- Ground Communications and Data Transport Requirements - Summary

Data and voice communications are required from I&T through operations phases, including:

Voice Loop Services: Voice conferencing capabilities shall be provided at each operational and launch site. A single voice line will be terminated at the test control center.

Integration and Test: Testing at GSFC will be performed using the IMAGE S/C, payload, observatory, DSN, and the GSFC SMOC. A command and data link is required between the SMOC, LMMS, DSN, SwRI, and WR for testing and operations phases. NISN voice and data links shall be provided for these areas as shown in tables 5-1 and 5-2.

Launch Site: Testing at WR will require communications to support Launch site integration testing and mission simulations.

Support during launch will require voice and data lines at WR, GSFC, and DSN.

The launch site facility is at Bldg. 836. NISN shall provide the required voice and data lines as shown in Tables 5-1 and 5-2 for launch site testing and the IMAGE launch.

Mission Operations Facilities: On-orbit checkout and nominal operations will require standard voice and data circuits between GSFC and DSN

NISN shall provide ground data delivery of command and telemetry data. Telemetry data shall be sent from the DSN NOCC at JPL to the SMOC at GSFC. Commands shall be sent from the SMOC to the NOCC. The data transport interfaces between GSFC and JPL shall be used for the entire IMAGE mission. The DSN and NISN shall provide the resources to accommodate concurrent operations for the IMAGE and MAP projects (even though they are both operated from the SMOC, they are operationally separate).

RT telemetry data shall be throughput from the stations to the SMOC. Recorded dump data shall be available in its entirety for file transfer to the SMOC from the DSN within two hours of the EOP. DSN procedures shall not require a manned presence in the SMOC for S/C contacts to allow IMAGE to operate in a lights-out mode.

Radio Metric information acquired by DSN shall be transferred to the FDF during all phases of mission support, using IP-encapsulated 4800 bit blocks.

Science instrument commands and planning information shall be transmitted from SwRI to the SMOC over Internet. Complete science packages (science and S/C data) shall be transported from the SMOC to the NSSDC via GSFC's local network. NSSDC shall provide a data archiving function and shall provide public access to this data.

The SMOC shall maintain a complete raw data history for IMAGE, with remote access provided (upon request) to the engineering and science teams.

The SMOC and DSN shall have all the required voice and data lines as shown in Tables 5-1 and 5-2 for on-orbit checkout and nominal operations.

IMAGE ground system elements are located as follows:

     GSFC:     SMOC (Bldg.3), MAR (Bldg. 3), FDF (Bldg. 28), NISN (Bldg. 3/14).

     DSN:      Station facilities: Madrid, Canberra, and Goldstone.
               Support facilities: NOCC (JPL), CDR (JPL).

     WR:       I&T Facility (Bldg. 836, Bldg. EEB, Bldg. 1610)

     LMMS:     I&T Facility (Bldg.107, Bldg.156)


IMAGE 5010 -- Voice Transport Requirements

5010.1		The SMOC shall have telephones available to each
                workstation location for the SCT's use.
5010.2		The SMOC shall provide phone mail to at least one
                workstation location.
5010.3		The SMOC shall provide at least one workstation location
                with long distance phone dialing capability.
5010.4		The SMOC shall be supported by the Voice Distribution
                System (VDS) with units available to each workstation location.

Response: Requirements will be met.


IMAGE 5020 -- Data Transport Requirements

SMOC
5020.1		The SMOC shall support the automatic transfer of
                non-quicklook data products to the NSSDC for archival.

5020.2		The SMOC shall support the automatic transfer of all of the
                data products to the IMAGE WWW server.

5020.3 	        The SMOC shall support the receipt of the science activity plan
                from SwRI via E-mail.

5020.4		The SMOC shall support receipt of VC0 & VC1 real-time and
                VC2 & VC3 playback data via a network interface.

5020.5		The SMOC shall provide a network interface to transmit
                CCSDS format commands to the DSN.
		
Response:  Requirements will be met.
NISN
5020.8		NISN shall provide a network interface to transmit VC0 &
                VC1 real-time and VC2 & VC3 playback data from WR to the DSN.

5020.9		NISN shall provide a network interface to transmit CCSDS
                format commands from LMMS to the DSN.

Response:
WR
5020.10	        The WR shall support the receipt of CCSDS format commands from 
                the DSN.

Response:


IMAGE 5100 -- Ground-to-Ground Data Transport Requirements

Ground-to-Ground data and voice transport requirements are shown in Tables 5000-1 and 5000-2.

Table 5000-1: Ground-to-Ground Data Transport Requirements

# From To Data Source Data Rate Type Schedule
1 DSN SMOC S/C TLM, OBC Dumps, SSR P/B <= 2,285,700
bps
RT and FTP L-13 to EOM
2 SMOC DSN S/C CMD 2 kbps RT L-13 to EOM
3 SMOC LMMS S/C CMD 2 kbps RT L-16 to L-1
4 LMMS SMOC S/C TLM, OBC Dumps, SSR P/B <= 2,285,700
bps
RT L-16 to L-1
5 DTF21 CTT
(LMMS)
S/C CMD 2 kbps RT L-12 to L-5
6 CTT
(LMMS)
DTF21 S/C TLM <= 2,285,700
bps
RT L-12 to L-5
7 DTF
21
CTT
(VAFB)
S/C CMD 2 kbps RT L-2 to L
8 CTT
(VAFB)
DTF21 S/C TLM <= 2,285,700
bps
RT L-2 to L

Table 5000-2: Ground-to-Ground Voice Transport Requirements

# Connections SCAMA Voice Loop Schedule
1 WR/DSN/SMOC/FDF/LMMS/MAR Launch Coord. L-3 to L
2 WR/DSN/SMOC/LMMS/MAR/FDF Delta Coord. L-3 to L
3 WR/SMOC/LMMS/DSN/MAR/FDF Launch Status L-3 to L
4 SMOC/DSN/LMMS/MAR Mission Ops. Coord. L-20 to EOM
5 WR/SMOC/LMMS/MAR Spacecraft Net 1. L-3 to L
6 WR/SMOC/MAR Spacecraft Net 2. L-3 to L
# Connections CCL Voice Loop Schedule
1 SMOC/MAR Mission Planning Coord. L-20 to EOM

Response:


IMAGE 6000 -- Data Processing Requirements - Summary

The SMOC will perform all necessary processing of R/T housekeeping telemetry to verify the observatory's current health and status. The SMOC will generate trend reports based on the complete record of observatory data to analyze and predict performance.

The SMOC will perform Level-0 processing on received instrument data. Level-0 processing is defined as the extraction of all telemetry packets for each instrument, removing duplicate packets, and putting them into spacecraft time order. These files will be made available on the SMOC web site, copied to CD ROM/DVD for each instrumenter team, but not forwarded to the NSSDC.

The SMOC will execute SwRI-provided program(s) which will convert the Level-0 files into Instrument Definition Files System (IDFS) files, and will make these files available on the SMOC web site, copy them to CD ROM/DVD, and forward them to the NSSDC for permanent archive and public access.

The SMOC- hosted WWW site will also be used to distribute IMAGE project documentation, data processing status reports, select spacecraft health and status information, and links to the investigator sites.

The SMOC is responsible for processing spacecraft ephemerides received from the DSN and generating orbit products needed for science data interpretation and operations planning.

For more details refer to the IMAGE PDMP.


IMAGE 6010 -- Level Zero Processing Requirements - Summary

6010.1		The SMOC shall process telemetry data into Level-0 files. 
                Level-0 files contain telemetry data packets in spacecraft time-order,
                with duplicate packets removed.

6010.2		The SMOC shall perform Level-0 processing automatically and immediately 
                upon receipt of the playback telemetry from the DSN during the current 
		pass.  This processing is done so that instrument telemetry data is made 
		available to the instrument teams as rapidly as possible.  This immediate 
		Level-0 processing is called Quicklook.

6010.3		The SMOC shall generate one Quicklook Level-0 file per instrument per pass.

6010.4		The SMOC shall make these Quicklook Level-0 files available on the SMOC web 
                server for a period of at least one week but no more than two weeks.

6010.5		The SMOC shall maintain a log of quicklook Level-0 processing.

6010.6		The SMOC shall perform Level-0 processing a second time, several days 
                after the playback telemetry was received from the DSN. This delay 
		allows time for recovery of data lost during previous passes.  The
                Level-0 files shall contain one day’s worth of data.

6010.7		The SMOC shall generate one 24-hour Level-0 file per instrument per day.

6010.8		The SMOC shall make these 24-hour Level-0 files available on the SMOC 
                web server for a period of at least one week but no more than 2 weeks.

6010.9		The SMOC shall forward these 24-hour Level-0 files to the NSSDC for 
                permanent archive and public access.

6010.10	        The SMOC shall write these 24-hour Level-0 files to CD-ROM/DVD for
                distribution to PI-selected investigators.

6010.11	        The SMOC shall maintain a log of 24-hour Level-0 processing and transfers.

Response: Requirements will be met.


IMAGE 6015 -- Level Zero-Point-Five Processing Requirements - Summary

6015.1		The SMOC shall provide for the execution of SwRI provided C
                program(s) to convert Quicklook Level-0 files into IDFS files.

6015.2		The SMOC shall maintain a log of the execution of this program(s).

6015.3		The SMOC shall make these 'quicklook' IDFS files available
                via the IMAGE www-server.

6015.4		The SMOC shall provide for the execution of SwRI-provided C
                program(s) to convert 24-hour Level-0 files into IDFS files.

6015.5		The SMOC shall maintain a log of the execution of this
                program(s).

6015.6		The SMOC shall make these ‘24-hour' IDFS files available
                via the IMAGE www-server.

6015.7		The SMOC shall write these 24-hour IDFS files to CD-ROM/DVD
                for distribution to PI-selected investigators.


6015.8		The SMOC shall forward these 24-hour IDFS files to the
                NSSDC for permanent archive and public access.

6015.9		The SMOC shall provide the means for IMAGE instrumenters to ftp new
                and updated Virtual Instrument Definition Files (VIDF) to the SMOC.
                These files contain the instrument calibration data required to convert 
                the instrument data from counts into calibrated engineering units.

Response: Requirements will be met.


IMAGE 6020 -- Level One Processing Requirements - Summary

6020.1		The SMOC shall provide for the execution of SwRI-provided C
                program(s) which export data into CDF files from IDFS files.
 
Response: Requirements will be met.


IMAGE 6025 -- Browse Product Processing Requirements - Summary

6025.1		The SMOC shall produce displays in the form of GIF and/or
                MPEG files, which are hereafter, called Browse Products (BP).  These
                displays will be generated from either the IDFS or CDF files, using either
                SwRI-provided plotting s/w, or IDL plotting s/w.

6025.2		The SMOC shall keep all BPs on the IMAGE www server through
                the end of the nominal 2-year mission operation.

6025.3		The SMOC shall produce a 'mission-composite' GIF showing
                simultaneous images from all of the instruments onboard.

6025.4		The SOC shall write these BPs to CD-ROM/DVD for
                distribution to PI-selected investigators.

Response: Requirements will be met.


IMAGE 6030 -- Data Distribution Requirements - Summary

6030.1		The SMOC shall produce CD-ROMs/DVDs on a weekly basis for
                PI-selected investigators.

6030.2		These CD-ROMs/DVDs shall include the 24-hour IDFS files and
                the 24-hour Level-1 files produced during the previous week of the mission.

6030.3		The SMOC shall ship the CD-ROMs/DVDs to the PI-selected
                investigators.

6030.4		The SMOC shall maintain a CD-ROM/DVD generation log.

Response: Requirements will be met.


IMAGE 6100 -- IMAGE WWW Site Requirements

6100.1		The SMOC shall maintain a WWW-server for the IMAGE mission
                through EOM.

6100.2		The SMOC shall make the latest 2 weeks of Level-0 files
                available on the WWW-server for downloading.

6100.3		The SMOC shall make the latest 2 weeks of Level-1 files 
                available on the WWW-server for downloading and browse/display.

6100.4		The SMOC shall make Mission Documentation and data
                processing history available on the WWW-server.

6100.5		The SMOC shall make all 'mission-composite' GIFs and/or
                MPEGs available on the www server for download and display.

6100.6		The SMOC shall make the latest 2 weeks of IDFS files
                available on the www server for downloading.

Response: Requirements will be met.


IMAGE 6300 -- Data Archive/Storage Requirements

Refer to IMAGE 4163 for archive and storage requirements.


IMAGE 7000 - Trajectory, Attitude, and Orbit Support Requirements

During the launch, early orbit, and deployment operations, DSN support shall be required using both the 34-meter and 26-meter DSN subnets. The 26-meter antennas will be used for launch and early orbit operations, and support will transition to the 34-meter Beam Wave Guide (BWG) antennas thereafter. Once nominal on-orbit operations are established, the 34-meter BWG subnet will be used for all science operations. The 26-meter subnet shall remain capable of providing command, telemetry, and radio metric support in the event of a spacecraft emergency, but will not be used for science operations. The 34-meter BWG subnet is required for all science data operations because of the link margin requirements for the 2.29 Mb data rate at apogee.

During nominal science operations the DSN shall perform ranging operations during the last 5 minutes of every pass. Doppler radio metric data shall be collected for all contact periods. Ranging shall be done during all launch and early orbit supports. All of the raw radio metric data shall be collected by the DSN, and forwarded in near real-time to the SMOC and Flight Dynamics Facility (FDF) at GSFC for preprocessing. The DSN shall store no less than 48 hours of raw radio metric data to support possible retransmission of lost data. The FDF shall store at least 30 days of raw and preprocessed radio metric data, but shall have no further requirements for data storage or archival. The raw radio metric data sent to the SMOC and FDF shall be in the JPL DSN TRK-2-15A formats. While the IMAGE spacecraft is tracked by the 26-meter subnet, the Doppler (range-rate) data shall comply with the STDN 724 UTDF format as well.

The orbit determination will be performed by DSN and verification and permanent data archival functions are performed within the SMOC. The FDF shall provide raw radio metric data to the SMOC via FTP so that the data may be archived in the SMOC. The FDF shall also provide a capability to the SMOC for timely (less than 5 minutes) FTP retrieval of preprocessed data in a format usable by the Goddard Trajectory Determination System (GTDS). The SMOC will use GTDS to perform the orbit determination and propagation functions within the SMOC. The DSN shall generate all of the acquisition data and planning products required for antenna pointing and the SMOC shall have this capability as a backup.

The spacecraft performs attitude determination. The spacecraft attitude determination requirement is 0.1 degree based on data from the autonomous star tracker. The lack of sufficiently accurate redundant sensors on-board the spacecraft limits any ground calibration requirements though the ground can validate normal performance of the onboard attitude determination system.

During the early operations and deployment phase, the SMOC shall be responsible for monitoring the reorientation of the spacecraft and taking any necessary corrective actions prior to the deployment of the RPI antennas. The SMOC shall monitor and control the deployment of the RPI antennas, and calculate the observatory’s moments of inertia.


IMAGE 7100 - Attitude Determination Requirements

The SMOC shall provide attitude analysis:.
7100.1          The SMOC shall provide an attitude determination capability.

7100.2          The SMOC shall validate that the onboard attitude estimate is within 0.1
                degree of its actual attitude.

7100.3          The SMOC shall provide a list of spin axes based on the ground ephemeris
                data.

Response:  Requirements will be met.


IMAGE 7200 - Orbit Determination Requirements

7200.1          The SMOC shall perform definitive orbit determination, definitive orbit
                propagation, and predictive orbit propagation.

7200.2          The maximum error permitted in the definitive orbit ephemeris shall be 50
                kilometers of uncertainty, 3 sigma.

7200.3          The maximum error permitted in the predictive orbit ephemeris shall be 50
                kilometers of uncertainty, 3 sigma.

7200.4          The SMOC shall perform orbit determination as necessary to meet the
                definitive and predictive requirements.

7200.5          The SMOC shall generate acquisition data in the JPL P-file format, and
                transmit the data to JPL.

7200.6          The SMOC shall generate short term planning products.

7200.7          The SMOC shall generate the acquisition data and short term planning
                products after each delivered orbit determination update.

7200.8          The SMOC shall generate long term planning products of 2 years duration
                every 3 months, and place those products on a website for retrieval by DSN
                personnel.  The product will support DSN loading studies and long term
                scheduling activities.

7200.9          The SMOC shall provide a 3 week ephemeris for science data planning.

7200.10         The SMOC shall receive processed and raw radio metric data from the FDF.

7200.11         The SMOC shall permanently archive all radio metric data.

Response:  Requirements will be met.


IMAGE 7201 - FDF Orbit Determination Requirements:

7201.1          The FDF shall receive radio metric data from the DSN via NISN.

7201.2          The FDF shall receive the radio metric data in IP-encapsulated 4800 bit
                blocks.

7201.3          The FDF shall process the received data and provide the SMOC the capability
                to retrieve the latest received data within 5 minutes of receipt.

7201.4          The FDF shall provide the received data in a format directly usable in
                GTDS.

7201.5          The FDF shall archive at least 30 days of preprocessed radio metric data.

7201.6          The FDF shall archive at least 30 days of raw radio metric data.

7201.7          The FDF shall provide the SMOC the capability to retrieve the data in raw
                format as requested by the SMOC.

Response:  Requirements will be met


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Author and Curator:

Dr. D.R. Williams, dwilliam@nssdc.gsfc.nasa.gov, +1-301-286-1258
NSSDC, Mail Code 633, NASA/Goddard Space Flight Center, Greenbelt, MD 20771

NASA Approval: J. L. Green, james.l.green@gsfc.nasa.gov
Last Revised: 04 November 1998