| Part |
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The lowest level of separately identifiable items. |
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| Payload |
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An instrument or communications component mounted on the spacecraft that provides measurement data or communications service to fulfill mission goals. |
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| Phase |
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Stage in the life cycle of a mission. |
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| Pilot signal |
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In the context of the Data Collection System, a continuous UHF signal to both the GOES-East and -West spacecraft, used to compensate for frequency drift in the spacecraft DCS transponder and to adjust the overall system gain by employing phase-lock loop technique. |
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| Portal |
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A virtual environment that provides organized capabilities to its users and a pathway to other content. |
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| Post-Launch Test (PLT) |
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Refers to a test phase, which begins immediately after LOR and acquisition of the desired checkout orbital location with the execution of a pre-defined series of spacecraft and instrument test plans. These test sequences are designed to verify compliance with all space and ground segment mission requirements. The PLT phase consists of two distinct periods; Activation and Characterization Test (ACT) and Systems Performance and Operations Test (SPOT). |
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| Pre-Launch (PREL) |
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The pre-launch phase provides for the design, construction, integration, and testing of each spacecraft, satellite integration and test, shipment to the launch site, as well as launch site activities. This phase also includes the development, installation, and testing of any associated ground equipment software, and facilities required during all subsequent mission phases. This phase begins at spacecraft contract award and continues until one day before launch (L-1 day). |
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| Primary instruments |
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All the ABI instruments |
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| Prime Contractor |
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The contractor under direct government contract, usually for a large project. |
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| Procedures and Guidelines |
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A documented description of how a Goddard organization will perform its own activities. |
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| Product |
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Derived data from the raw instrument measurements in a specific output format. Products may be classified as Level 0, Level 1, and Level 2+ depending on their degree of processing. |
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| Product Baseline |
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Indicates product or product parameters that are part of the base contract. |
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| Product Development Lead (PDL) |
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The leader of the contractor and/or civil servant team responsible for the development of a GOES-R product as part of the Flight Project or Ground Segment Project. Responsible for assigning risks to team members, including study and development contractors, and also verifying that new risks submitted to the team have been routed correctly and vetted through the risk management process described in the Risk Management Plan. |
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| Product Distribution (PD) |
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Includes distribution of Level 1b, Level 2+, and derived products to user portals while addressing interfaces with the user for accessing GOES data. The primary user portals include the GOES-R satellite series (e.g., for uplink of Global Re-Broadcast (GRB)) NOAA’s National Weather Service (NWS). |
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| Product Extent Qualifier |
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Provides product specific limitations to the solar zenith angle coverage of the products over which a product can be computed. The use of the term quantitative in any of the product extent qualifiers defines the generation of the product while meeting the threshold product measurement accuracy performance in that region, whereas the use of qualitative in any of the product extent qualifiers defines the generation of the product without meeting the threshold product measurement accuracy performance requirements. For CONUS (3000 km x 5000 km) products and mesoscale (1000 km x 1000 km) products, the product will be computed within the CONUS-sized measurement area and the mesoscale-sized measurement area that falls within the product qualifier limitations. |
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| Product Generation (PG) |
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Includes algorithm support, processed raw data, processing to Level 1b (including calibration, navigation and registration), generation of the data for rebroadcast and for higher level data creation including operational derived products. The government will provide the necessary science algorithms for the generation of user products. |
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| Product Geographic Coverage / Conditions |
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The size of the area that must be observed in the revisit time in order to complete the product; in the case of CONUS, it also specifies a particular area as well as location. The GOES-R products will be calculated for the coverage areas of the L1b data provided by the instrument, subject to the Product Qualifiers. |
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| Product Horizontal/ Angular Resolution |
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Product Horizontal/Angular Resolution is defined for the Space and Solar Products only and is nominally the equivalent of the Product Horizontal Resolution. |
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| Product Horizontal Resolution |
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The finest horizontal spatial element of the product measured at nadir. The GOES-R System will not spatially degrade the product horizontal resolution beyond that of the L1b data of the earth-looking instruments when making Level 2 and higher products, except in the generation of GOES-R products with coarser horizontal resolution. |
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| Product Long-Term Stability |
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The deviation in accuracy over a period of time, typically the lifetime of the mission, unless otherwise specified in the product long-term stability values. |
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Product Mapping Accuracy
(Product Navigation) |
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The accuracy of the registration of the collected data to the appropriate Earth or other reference frame. The GOES-R System will geolocate the GOES-R series L1b data (which meets instrument image navigation and registration requirement for earth-looking instruments) to comply with the product mapping accuracy requirements. |
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| Product Measurement Accuracy |
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The accuracy of the product, namely the absolute difference between the sufficiently-sampled mean product value (taken over a sufficiently large data set of comparable conditions so that the uncertainty in the determination of the mean is smaller than the product measurement accuracy) and the corresponding value of the absolute standard. For products that are classified into levels for accuracy levels, the accuracy is clarified per product and is often a probability of correct classification. |
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| Product Measurement Precision |
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The one-sigma standard deviation of the distribution of the determined values over a sufficiently large number of determinations so that the uncertainty in the determination is smaller than the standard deviation (unless otherwise noted in each product precision). For products that are classified into levels for precision, the precision is clarified per product and is often a probability of correct classification. |
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| Product Measurement Range |
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The range from the minimum to the maximum values over which the product will be measured. |
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| Product Option |
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Indicates product or product parameters that are part of the contract options. |
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| Product Orthogonality / Coverage |
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(Space and Solar Products only) The equivalent of the Product Geographic Coverage. |
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| Product Pointing Knowledge / Mapping Uncertainty |
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(Space and Solar Products only) The knowledge of the line of sight of the space and solar instruments. |
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| Product Pointing/ Mapping Accuracy |
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(Space and Solar Products only) The equivalent of Product Mapping Accuracy. |
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| Product Refresh Rate/Coverage Time |
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The time between the completion of the nth update of the product and the completion of the (n+1)th update of the same product. The GOES-R baseline product tables list refresh times for products. However, ABI data may be produced more frequently than the listed times, particularly due to the different scan modes of ABI. Products that rely on surface observations with product refreshes that are long, compared to the instrument image refresh times, benefit from observations without obscurations caused by clouds. |
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| Product Reproducibility |
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The degree to which the information is replicated, subject to an acceptable degree of imprecision as defined in the GS F&PS |
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| Product Set # |
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Subset of the total GOES-R products, indicating which products are required for implementation at certain delivery milestones. |
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| Product Statistics Qualifier |
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Provides product specific limitations, where applicable, to the product generation scene statistics under which the product measurement accuracies apply. |
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| Product Vertical Resolution |
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Defined as layering averaging of the resultant samples corresponding to different heights in the atmosphere; where only one vertical sample is collected, no layer averaging is needed. The GOES-R System will produce the required vertical layering of the GOES-R products employing external data sources if needed. For typical imaging products, the vertical layering is typically over the total column. |
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| Program Material Review Board |
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The formal Contractor board established for the purpose of reviewing, evaluating, and disposing of specific nonconforming materials, supplies or services, and for ensuring the implementation and accomplishment of corrective action to preclude recurrence. |
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| Protoflight Testing |
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See Hardware. |
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| Prototype Testing |
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See Hardware. |
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| Proxy data |
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Customized test input and output data files, developed from real data and modified to represent input for a specific product generation algorithm. |
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| Pseudo-telemetry |
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New telemetry point(s) that are generated/derived on the ground by combining or manipulating (through the use of mathematical instruction) one or more satellite telemetry points. These are created for ease of trending and analysis. |
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| Pull |
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Mode for data access in response to a user request where a user (or user environment, if automated) is notified of availability of data for pickup from a specific distribution server. Once notified, the user (or user environment) initiates the transfer of the data from a distribution server |
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| Push |
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Mode for data access in compliance with a pre-established user agreement where a distribution server automatically sends data to a user environment without prior notification to the user. |
