Nanometrics Data Formats Reference Guide

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Contents 4.4.1.10 TriggerRequest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 4.4.1.11 EventRequest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 4.4.2 Response messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 4.4.2.1 ReadyMessage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 4.4.2.2 ChannelList . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 4.4.2.3 PrecisList . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 4.4.2.4 ChannelHeader. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 4.4.2.5 DataSize . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 4.4.2.6 NaqsEvent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 4.4.2.7 NaqsTrigger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 4.4.2.8 CompressedData . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Chapter 5 Tagged File Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 5.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 5.2 Data types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 5.3 Tag format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 5.4 Tag types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Chapter 6 Y-File Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 6.1 File format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 6.2 Field descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 6.2.1 TAG_STATION_INFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 6.2.1.1 Station ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 6.2.2 TAG_STATION_LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 6.2.3 TAG_STATION_PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 6.2.4 TAG_SERIES_DATABASE, TAG_STATION_DATABASE. . . . . . . . . . . . . . . . . . . . . . 61 6.2.5 TAG_SERIES_INFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 6.2.6 TAG_STATION_RESPONSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Appendix A Data Stream Client. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Appendix B Serial Packet CRC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 iv
Chapter 1 NMXP Data Format 1.1 Overview Data received on the serial port of the instrument are packetized in NMXP format and then these packets are embedded in standard UDP packets prior to transmission. This chapter defines the NMXP format for inbound data. It includes an overview of packet structure, a list of packet types, and descriptions of packets and bundles. NMXP data transmission format facilitates the transfer of data along with a wide variety of status information from an instrument to a central site. The data format requires that the instrument have an accurate time source (i.e. GPS) for time tagging the data prior to transmission. NMXP data format: • Supports error free transmission of data using retransmission requests of bad packets. • Is simple to implement, even on small microprocessors • Is expandable: As new status information messages are created, they can be added to the data format without affecting the existing information. • Supports programmable frequency for status information: Most of the status messages can be transmitted at a user defined frequency. This allows the user to tailor the ratio of data to status information. This is important on limited bandwidth or noisy transmission media. • Provides efficient bandwidth usage 1.1.1 Overview of Protocol Communication between the equipment and the Naqs receiver is completely stateless - there really is no protocol. When you turn on an instrument, it sends unsolicited data. Each packet is labelled with a channel-specific sequence number and also provides the sequence number of the oldest packet available for that channel. The receiver may send retransmission requests to request retransmission of certain packets (by sequence number). The instrument marks the requested packets for retransmission and sends them as bandwidth permits. 14602R4 Nanometrics Data Formats 2003-11-07 Reference Guide 1
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Chapter 4: Data Access Protocol 4.4
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Chapter 4: Data Access Protocol 4.4
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Chapter 5: Tagged File Format PTR a
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Chapter 5: Tagged File Format 37 TA
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Chapter 6: Y-File Format UCHAR UCHA
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Chapter 6: Y-File Format ULONG LONG
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Appendix B: Serial Packet CRC SendB
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