| DATA_SET_DESCRIPTION |
Data Set Overview : This data set contains count rate tables derived from the Juno Stellar Reference Unit (SRU) EDR images. This data set uses the Committee on Data Management and Computation (CODMAC) data level numbering system. The SRU count rate tables are considered Level 5 or Derived Data (equivalent to NASA Level 1C). Processing : SRU count rate tables are produced in '.CSV' format and consist of comma-delimited values. Data : SRU count rate tables (CRTs) contain derived electron count rates from a series of SRU images acquired during an orbit. The process by which these are derived is explained in the Software Interface Specification (SIS): Stellar Reference Unit Standard Data Products. Typically these SRU images are taken near perijove. Image processing includes geometric correction, star identification and removal, hot pixel removal, and count rate detection. One of two methods of count rate quantification is used, depending on the noise level observed in the image. Details of this processing are described in the SIS. One count rate table (CRT) will be produced for each orbit. Within one orbit's table, each row will represent the derived count rate from one SRU image. The count rate values are derived from one of the two measurement techniques described in the SIS, indicated by a valid value in either column 4 or 5. The measurement technique will be chosen based on the overall radiation-induced noise level of that image. There are six fields in the table. The columns are as follows: SCET (UTC) corresponding to midpoint of SRU image exposure; SCLK corresponding to midpoint of SRU image exposure (following conversion from the native format provided in the Event Verification Record (EVR) which telemeters the SRU-generated image time tag); Identification number of the SRU that the image was taken with; Detected count rate ('cluster' counts per square cm of CCD area per second), if valid; Derived rate of deposited noise signal ('DN' per pixel per second), if valid; Derived count rate per square cm of CCD area per second using one of the previous methods that is valid. Column 4 or 5 will have a value of 1.0E-31 if that measurement technique is not valid; in that case the other column will have a valid value. Each table product has two parts: the table itself with the extension of 'CSV' and a detached label with an extension of 'LBL'. Refer to the Stellar Reference Unit Standard Data Products Software Interface Specification (SIS) for further details on these data products.
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