4145.1 The SMOC shall provide the capability to process commands for uplink to the spacecraft from previously generated command load files. 4145.2 The SMOC CMS shall allow the user to generate SCU loads. SCU loads include: 4145.2.1 ATS 4145.2.2 ATS patch 4145.2.3 RTS loads 4145.3 The SMOC CMS shall notify the user of any errors or warnings encountered during load generation. 4145.4 The SMOC CMS shall notify the user if any loads are affected by any changes made to the system or the data used in the command load. 4145.5 The SMOC CMS shall allow the user to create, edit, generate, transfer, and delete ATS loads. 4145.6 The SMOC CMS shall allow the user to create a load and specify the load period start and stop times by selecting an activity plan period. 4145.7 The SMOC CMS shall enable the user to expand activities in the load. 4145.8 When modifying the load, the SMOC CMS shall allow the user to modify a time tag and command parameters that are inserted in the load as a result of expanding an activity. 4145.9 The SMOC CMS shall assign activities to either RTS or ATS memory based on the activity assignment. 4145.10 The SMOC CMS shall construct RTS call commands to start the execution of activities assigned to RTS memory, assign the table number to the RTS call command, and assign these RTS call commands to ATS memory. 4145.11 The SMOC CMS shall construct the auto switch command and assign it to ATS memory, if auto switching is enabled. The time of the buffer switch command shall be either the time tag of the last command in the selected load period or the end of the load period minus a constant, whichever is later. 4145.12 If an ATS activity expands beyond the load period, the SMOC CMS shall save those commands falling into the next period and include them in the next period's planning segment when the user promotes the load. 4145.13 The SMOC CMS shall verify that the tables assigned to RTS's, used by an ATS load, are of the type assigned for SCU use. 4145.14 The SMOC CMS shall expand ATS activities in the load into absolute time tagged commands. 4145.15 The SMOC CMS shall create the ATS load and ATS patch load file in the format described in the TBD. 4145.16 The SMOC CMS shall enable the user to transfer load files to the spacecraft command processing system. 4145.17 The SMOC CMS shall generate an integrated print report for ATS loads and ATS patch loads. 4145.18 The SMOC CMS shall generate a load generation report for ATS loads and ATS patch loads. 4145.19 The SMOC CMS shall log all ATS load and ATS patch load generation errors to the event log and load generation report. 4145.20 The SMOC CMS shall verify that ATS loads and ATS patch loads do not violate the maximum ATS buffer size constraint. 4145.21 The SMOC CMS shall verify that ATS loads and ATS patch loads do not violate the maximum number of commands constraint. 4145.22 The SMOC CMS shall verify that ATS loads and ATS patch loads do not violate the number of commands per second constraint. 4145.23 The SMOC CMS shall verify that ATS loads and ATS patch loads do not violate the minimum delay time constraint. 4145.24 The SMOC CMS shall verify that ATS loads and ATS patch loads do not violate the maximum delay time constraint. 4145.25 The SMOC CMS shall verify that ATS loads and ATS patch loads do not violate RTS activation constraints. 4145.26 The SMOC CMS shall verify that RTS loads activated by ATS loads and ATS patch loads are uplinked and enabled. 4145.27 The SMOC CMS shall allow the user to create, edit, generate, transfer, and delete RTS loads. 4145.28 The SMOC CMS shall enable the user to select the table into which the RTS load will be stored. 4145.29 The SMOC CMS shall allow the user to select the intended use for each RTS load. The selections consist of the following: 4145.29.1 Health and Safety (H&S) 4145.29.2 SCU 4145.30 The SMOC CMS shall validate that an RTS load is assigned only to an RTS table that is on the list of tables reserved for that type of RTS usage [SCU, H&S], available, and enabled. An RTS table is available if it has never been loaded, the load in the table has expired, or the load in the table has been deleted. An RTS table is enabled if the table status is set to enabled. 4145.31 The SMOC CMS shall allow the user to specify a time at which the table assigned to the RTS shall be reserved to support it. 4145.32 The SMOC CMS shall allow the user to enter a time when the RTS load shall expire (i.e., the table occupied by the RTS load shall become available to be overwritten). 4145.33 The SMOC CMS shall allow the user to set the table status (enabled/disabled). 4145.34 The SMOC CMS shall alert the user of affected loads when an RTS table's status is disabled. 4145.35 The SMOC CMS shall create the RTS load file in the format described in the Telemetry and Command Handbook and IMAGE CIDP to SI ICD. 4145.36 The SMOC CMS shall generate a load generation report for RTS loads. 4145.37 The SMOC CMS shall log all RTS load generation errors to the event log and load generation report. 4145.38 The SMOC CMS shall verify that the RTS load does not violate the maximum RTS buffer size constraint. 4145.39 The SMOC CMS shall verify that the RTS load does not violate the maximum number of commands constraint. 4145.40 The SMOC CMS shall verify that the RTS load does not violate the number of commands per second constraint. 4145.41 The SMOC CMS shall verify that the RTS load does not violate the minimum delay time constraint. 4145.42 The SMOC CMS shall verify that the RTS load does not violate the maximum delay time constraint. Response: Requirements will be met.
4146.1 The IMAGE SMOC shall provide the following CCSDS command services: 4146.1.1 Telecommand Data Management Service for commands initiated by the SMOC. This level interfaces with the spacecraft controller for command requests and produces command packets for eventual uplink. 4146.1.2 Telecommand Data Routing Service for commands initiated by the SMOC. 4146.1.3 Telecommand Channel Service for all commands. This service handles the reformatting and encoding of commands and monitoring of the telemetry stream to determine the reception of the command by the spacecraft using the CCSDS Command Operations Protocol number 1 (COP- 1). 4146.2 The SMOC shall be capable of uplinking any CCSDS packet formatted command that conforms to the following limitations: 4146.2.1 Version 1 4146.2.2 Secondary header is optional 4146.2.3 No greater than 233 bytes long 4146.2.4 The Telecommand Transfer Frame shall be Version 1 with 2 virtual channels. One virtual channel shall be utilized for non-packetized commands; the other shall be utilized exclusively for packetized commands. 4146.2.5 The Telecommand Codeblock shall be 40 bits in length. 4146.3 Forward Link Management: The SMOC shall provide a mechanism to control access to the command link by Associate stations and IGSEs to control the grouping and formatting of commands for transmission. 4146.3.1 The IMAGE SMOC shall provide a mechanism to enable and disable the issuance of commands by the IGSEs and each of the SMOC-provided ASIST stations. 4146.3.2 The IMAGE SMOC shall provide the spacecraft controller with control over the content and formatting of commands within a CLTU, including the number of Telecommand Transfer Frames (hence Telecommand Packets) within a CLTU, error injection (for negative testing), and CCSDS control information. 4146.3.3 The IMAGE SMOC will allow the operator and "lights out" (unattended) system to control the command "uplink" clock rate, continuously send the same command link transmission unit, and enable or disable ground processing of the COP-1 protocol. 4146.4 COP-1 Protocol Management: The SMOC will provide COP-1-protocol management functions. 4146.4.1 The SMOC shall support the COP- 1 protocol with supporting command buffer management. 4146.4.2 Spacecraft controller control over the COP- 1 characteristics and options shall be provided in real time. 4146.5 Command Verification: The SMOC will provide command verification functions. 4146.5.1 In addition to COP-1 verification, the SMOC will provide the capability to verify commands by telemetry verification. This function will be operator enabled/disabled. 4146.6 Command Logging: The SMOC will provide command logging functions. 4146.6.1 The SMOC shall maintain an online data set and printer log of all commands issued to the spacecraft, the source of command initiation, the time the command was issued, and the command verification status. 4146.7 Command Screening: The system shall maintain a list of commands that will require spacecraft controller approval prior to the sending of the command. The primary spacecraft controller must explicitly allow each of the critical commands to be forwarded to the spacecraft through the use of an independent real time directive. The directive is issued by the primary spacecraft controller upon notification that one of the users (or the primary spacecraft controller) has entered the command into the command stream. The command may also be explicitly canceled by the primary spacecraft controller. 4146.7.1 The SMOC shall provide critical command checking from all users, with control of the command provided to the primary spacecraft controller. 4146.7.2 Commands routed to the spacecraft shall be screened against a configured list of users, allowing the primary spacecraft controller to allow each user only an agreed-to set of spacecraft commands. 4146.7.3 The primary spacecraft controller shall explicitly allow each of the critical commands to be forwarded to the spacecraft through the use of an independent real time directive. Response: Requirements will be met.
4150.1 The SMOC shall receive, quality check, decommutate, and process CCSDS real-time and play-back telemetry. Response: Requirement will be met.
4151.1 The SMOC shall process CCSDS channel access data units that conform to the following constraints: 4151.1.1 Operational control field containing Command Link Control Word (CLCW) is present 4151.1.2 Fixed format VCDU with Insert Zones 4151.1.3 Packet data order is "forward" 4151.1.4 Cyclic Redundancy Code (CRC) appended to each telemetry frame 4151.2 The SMOC shall record and distribute CCSDS formatted housekeeping packets that conform to the following constraints: 4151.2.1 Version 1 packets 4151.2.2 All packets have identically structured fixed format secondary header Response: Requirements will be met.
4152.1 The SMOC shall decommutate CCSDS formatted housekeeping packets that conform to the following additional constraints: 4152.1.1 The length of a packet for a given APID is a multiple of 16 bits Response: Requirements will be met.
4153.1 The SMOC shall be capable of receiving and distributing real time and playback virtual channels as downlinked from the spacecraft 4153.2 The SMOC shall provide the capability to select a new telemetry data source and reinitialize the status and accounting parameters within 60 seconds of the request. This includes resetting the Current Value Table (CVT) to purge all previously received telemetry data. Response: Requirements will be met.
4154.1 The SMOC shall be capable of receiving and distributing real-time and playback virtual channels as downlinked from the spacecraft. 4154.2 The SMOC shall be capable of receiving and processing previously recorded spacecraft data in the following combinations: 4154.2.1 Replay of real-time only at rates of up to 40 times real-time 4154.2.2 Replay of playback only 4154.3 The SMOC shall support recording of history data in real-time, postpass replay of recorded data, and history maintenance capabilities. 4154.4 The SMOC shall record all valid telemetry data. 4154.5 The SMOC shall provide a replay capability based on the ground receipt time, spacecraft time, virtual channel and ground station ID. Response: Requirements will be met.
4155.1 The SMOC shall provide labeled formatted table displays. Table values shall be obtained from the latest dump of a table and/or the configured table source. 4155.2 The SMOC shall create and edit partial/full table load files from STOL and from a screen editor. 4155.3 Load and dump files shall use the same format. 4155.4 The SMOC shall provide table Configuration Management. Multiple versions of the same table shall be allowed including the current flight values. Configured tables shall be processed as defined in requirements 4155.1 and 4155.2. 4155.5 The SMOC shall provide the capability to load and dump spacecraft memory. Note: The SMOC will not be required to maintain GRI for any instruments. Response: Requirements will be met.
4156.1 The SMOC shall be capable of accepting and processing IMAGE telemetry which has any combination of PN encoding and Reed Solomon encoding. 4156.2 In the normal mode of operation, the SMOC shall monitor the status of each physical channel, and notify the operator of errors. 4156.3 The SMOC shall provide data quality checking of the transfer frames and append the information to each source packet. 4156.4 The SMOC shall determine the quality of each transfer frame based on the frame decoding. 4156.5 The SMOC shall provide a user selectable switch to enable/disable the flagging as bad quality the data containing sequence errors in the VC frame count. 4156.6 The SMOC shall validate CLCW data quality. If a transfer frame has an uncorrectable error, the CLCW will not be extracted. If a quality error is detected, the SMOC shall generate an event message to indicate the error occurred. 4156.7 The SMOC shall be capable of storing abnormal (i.e. quality error detected) telemetry VCDUs to a file and printing that file. 4156.8 The SMOC shall receive and process up to 64 virtual channels. 4156.9 The SMOC shall monitor and display virtual channel statistics including quality, rates, number of frames, and Reed-Solomon corrections. 4156.10 The spacecraft controller shall be able to dynamically select the virtual channels to be processed. 4156.11 Data rates beyond the maximum rate shall be processed on a priority basis. 4156.12 The frames shall be quality checked with real time operator notification of "bad" VCDUs. Response: Requirements will be met.
4157.1 The SMOC shall extract CCSDS formatted packets from each virtual channel based on packet application ID. Each packet will be annotated with the physical channel identifier, virtual channel number, spacecraft time, virtual channel counter and quality of the telemetry frame from which it was extracted. 4157.2 The SMOC shall extract the spacecraft time from the packet secondary header (CCSDS Unsegmented Time Code (CUC)) and store it in the system. 4157.3 The SMOC shall monitor the data quality of each packet, and append the quality to each packet for subsequent distribution and display. 4157.4 Each received packet shall be monitored to verify that it is structurally complete and the length matches the length defined in the telemetry and command database. 4157.5 The SMOC shall provide the capability for viewing unformatted telemetry data. 4157.6 The SMOC shall correct any "byte swapping" and "word swapping" performed by the IMAGE C&DH system. 4157.7 The SMOC shall be capable of optionally checking any telemetered data item against a set of user definable limits, and then report limit failures. 4157.8 The SMOC shall maintain the last reconstructed value for each data item for use for displays, limit checking, automated test procedure control, and other application processes. 4157.9 The SMOC shall support the concatenation of bits from noncontiguous locations within the packet to form a single telemetry parameter. 4157.10 The ground system shall provide data conversion from raw to engineering units, including polynomial (no degree limit), spline, piece-wise linear, logarithmic, exponential, and power conversion equations. 4157.11 The engineering units conversion shall be able to approximate the actual value to +-1 % of the actual measurements given during calibration tests. 4157.12 All data points for which limit checking is enabled shall be checked. 4157.13 Limit checking will be performed on both analog and discrete telemetry parameters. 4157.14 Limit checking shall include inclusive and exclusive range specifications, open and closed limit intervals. 4157.15 Up to two sets of high/low limits can be defined for each telemetry parameter. If two sets are defined for one parameter, the values of the switch mnemonics associated with the limit sets shall be checked to determine which limit set to use. 4157.16 The SMOC shall set a filter factor for the number of occurrences of values outside of the normal limits in determining if a limit violation has occurred. 4157.17 The SMOC shall provide the capability to accept temporary changes to limit processing in real time. 4157.18 The SMOC shall provide discrete state conversions as identified in the Project Database (PDB). 4157.19 The capability to display states of discrete variables in different colors is required. 4157.20 The SMOC shall provide the capability to dump and verify the contents of the SCU memory, tables and stored command system. Additionally the system shall process messages generated by the flight software. 4157.21 The SMOC shall extract real-time "SCU and CIDP-Generated" event packets, log them to the line printer, make them available to a system spacecraft event page, and maintain a queue of at least the capacity of the onboard event buffer. The system shall store all events to disk. 4157.22 The SMOC shall provide a mechanism to refer to real-time telemetry and system named variables, and temporarily modify the limits and curves to be used locally at a controller station. All variables shall be accessible "as downlinked", as :"raw transformed to host bit order", or "converted to engineering units". 4157.23 The user shall have the ability to turn on/off the limit checking on an individual point basis, globally or for several telemetry points by associating a list of telemetry points with a name. The control of limit checking shall apply only to the local spacecraft controller's station. 4157.24 The user shall have the ability to temporarily modify, delete, and add limits and conversion coefficients for telemetry database items. These modifications shall apply only to the local controller's station and be valid until termination of the current on-line session. 4157.25 The system control language shall provide a capability to compose mathematical expressions of system variables of pre-launch and on-orbit activities, including functions of one or more variables, common unary and binary operators, and logical expressions. 4157.26 The system shall support the modularization and execution of subprocedures. The system shall support flow control expressions, such as unconditional branching, conditional branching, and looping. The system shall support conditional, unconditional, and timed waits (pauses in execution). 4157.27 The spacecraft controller shall have full interactive control in real-time over the execution of procedures, including stop, start, abort, wait, branch, and subprocedure execution. 4157.28 The currently executing procedure on a spacecraft controller station shall be suspended (placed in HOLD mode) whenever the procedure contains an invalid statement. 4157.29 The SMOC shall provide the capability to enable procedure suspension when the limit checking subsystem local to the spacecraft controller station detects a limit violation. Response: Requirements will be met.
4158.1 Stored playback housekeeping data shall be delivered to all IGSEs via the same format as the real time interface as described MIDEX IGSE/SGSE Interface Requirements Control Document. 4158.2 The SMOC shall optionally compare the playback data against real-time data taken over the same time period and report discrepancies in the data. 4158.3 The Solid State Recorder (SSR) will be sized to hold at least two orbits worth of data. 4158.4 The SMOC will be able to command the SSR in any of the following manners: 4158.4.1 The SMOC will be able to command a complete dump of the SSR and this dump will take no longer than a 30 minutes. 4158.4.2 The SMOC shall be able to command a normal dump of the SSR where the dump will automatically begin where the previous dump ended, and the dump will automatically end when it reaches the end of recorded data or current record pointer. 4158.4.3 The SMOC shall be able to command a frame-by-frame dump by specifying the physical address of any frame in the SSR. The frame addresses are telemetered to the ground in the VCDU secondary header. Response: Requirements will be met.
4159.1 The SMOC shall decompress all compressed science data. 4159.2 The SMOC shall use the RICE method of decompression as described in the CCSDS Lossless Data Compression, Blue Book, 121.0-B-1. Note: Decompression parameters shall be fixed for life-of-mission. Response: Requirements will be met
Author and Curator:Dr. D.R. Williams, email@example.com, +1-301-286-1258