DM-0235

Description

Driver for US Navy's Naval Undersea Warfare Center (NUWC) RSDF position, heading and speed data.
The Range Site Data Format (RSDF) and Range Site Data Format Geodesic (RSDFG) are used to send data from remote ranges to NUWC Keyport's Range Information Display Center (RIDC) over a high speed data link.

The RSDF input driver can be used together with the RSDF output driver to buffer the input data stream, insert and convert position records and/or change the RSDF format, and output the updated data stream.

See for more information on the Range Site Data Format (Geodesic), the documentation from the NUWC.

Driver Information

No information available.

Decoding Notes

The driver automatically detects the format in which the positions are encoded, RSDF or RSDFG, by determining the number of fields in a position record: RSDFG position records have two fields more.

Course values in RSDF records are assumed to be grid bearings; course values in RSDFG records are assumed to be true bearings. Speed values are always assumed to be in knots. Length units (X, Y, Z, altitudes) are assumed to be in US survey feet by default, but this can be changed in the registry.

Depending on the actual database setup, the records that can be decoded by the RSDF-RSDFG are:

• HS - Run Statistics Header
• PP - Processed PSK Data
• PC - Processed Cinesextant Data
• PG - Processed GPS
• PR - Processed Radar
• BC - Block Byte Count
• CS - Checksum Information

Records that are not decoded, but are passed through when an RSDF output driver is running, are:

• CT - CTD Data
• CC - CTD Statistics
• SR - Run Security
• HR - Run ID Header
• DV - Sound Velocity Data
• VC - Sound Velocity Comments
• MK - Mark Information
• TO - Time Only
• TC - Trailer Comments
• ED - End Record

Some of the passed-through records remain un-altered; other records are changed, depending on user settings.

See the RSDF-RSDFG output driver description for more information on the buffering mechanism options.

Database Setup

In order to use  multiple vessel positions , add a new "Object" for each vessel and add a "System" of type "Position Navigation System" to each of the vessels. Be sure to select the same driver and I/O parameters. Enter the appropriate object ID or PSK code as receiver number. Since altitudes can be with respect to mean sea level, be sure to select the appropriate vertical datum. In order to decode the  compass headings , add a "System" of type "Gyro" to each vessel. Enter the object ID or PSK code as gyro observation slot identifier. To decode the  speeds , add a "System" of type "Speed Log" to each vessel. Use object ID as slot number.

PP records . For PSK (PP) records, there is an option to decode only the positions from a certain array, using the slot number "PSK_Code*100 + array_number". For example, when using slot "11", all PP records with PSK Code 11 will be decoded. If there is more than one PP record with this code in a valid RSDF block (from HS record to CS record), only one position is decoded by the RSDF input driver (usually the last one). When using slot "1104", the input driver will only decode PP records with PSK Code 11 and array 4.

Note . Make sure that all RSDF systems and observations have receiver numbers or slot numbers defined.

Online

To be able to monitor the user-defined security classification, the title bar of the Controller can display the contents of the "survey type" field in the "general" category of the database setup program. This string value must be entered during the database setup process. In case the field is empty or contains an unrecognized value, the security classification string is not displayed. Note: strings will be handled case-non-sensitive.

If the survey type field contains one of three pre-defined values, "unclassified", "confidential" or "secret", the Controller title will be modified according to one of the following formats:

"template database name - Controller [Unclassified]"
"template database name - Controller [Confidential]"
"template database name - Controller [Secret]"

Registry Options

[HKEY_CURRENT_USER\Software\QPSQinsy\7.0\Drivers\RSDF\Settings]

Note . If HS Time Frame is set to 0, then PPS time is used, i.e. time of arrival of the first byte at COM port.

Note . If HS Time Frame is set to 2, then HS block times are supposed to be in the local system time of the computer on which Qinsy is running. All timetags are converted to UTC using the local time zone setting.

Note . If an RSDF output driver is running, then these registry settings can be changed using the "Formats..." dialog button on the output driver window. It is therefore recommended to always add an RSDF output driver to the Database Setup, even if no output data is to be sent, so that a user can always check and change these settings.