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
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.
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
6 + nx - 1 where
nx is the number of
elements in the State vector.
Each of these lines must contain
Because this is a covariance matrix it must be
Often the elements of the initial state estimate are not correlated.
In this case, the initial covariance is a diagonal matrix.
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
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
file DATA.VAL in the
Thus the file name in this field is initially
You can change the source of the data values
by changing the file name in this field.
The following is a picture of the Data window for the example in
In addition, the file DATA.VAL in the
contains the following values: