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Description
The Data window contains values that are inputs to the filtering algorithm. It is an O-Matrix editor and as such you can perform standard editing commands within the window and using the Edit option from the O-Matrix menu bar. The fields in the Data window must appear in the same order as they are listed below:

BAD VALUE

The first line of the Data window must consist of this text. The value on the following line defines the bad data value for KBF. Values in the file specified by the DATA VALUES field that have the bad data value will be ignored.

INITIAL STATE ESTIMATE

The third line of the Data window must consist of this text. The value on the following line specifies the initial state estimate. The number of values on this line determines the number of elements in the State vector; i.e., nx . The values must appear in the same order as the State vector and be separated by spaces.

INITIAL COVARIANCE

The fifth line of the Data window must consist of this text. The initial state estimate has a covariance matrix that specifies how accurately it approximates the initial state. The values of this covariance matrix must start at line six and continue to line 6 + nx - 1 where nx is the number of elements in the State vector. Each of these lines must contain nx values. Because this is a covariance matrix it must be positive definite . Often the elements of the initial state estimate are not correlated. In this case, the initial covariance is a diagonal matrix.

MODULO

The line following the last line in the covariance matrix must contain this text. The line after that contains one value for each element of a data vector. If a value is zero, there is no modulo for the corresponding element of the data vector. If the value is not zero, it is the modulo for the corresponding element of the data vector. For example, if one element of the data vector is an angle measured in degrees, the corresponding modulo value should be 360.

DATA VALUES

The line following the modulo values must consist of this text. The name of the file containing the data values follows directly below. When a study is loaded, the values in this field are copied from the DataRecord to the file DATA.VAL in the temporary directory . Thus the file name in this field is initially TMP\DATA.VAL. You can change the source of the data values by changing the file name in this field.

Example
The following is a picture of the Data window for the example in EXAMPLE.KBF .



In addition, the file DATA.VAL in the temporary directory contains the following values:
     19.372 107.759
     22.161 104.008
     20.752 104.096
     21.608 108.792
     14.187 114.778
     09.812 120.034
     06.191 124.459
     08.104 121.789
     10.782 121.566
     15.898 115.941