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SemAlmanac.ReadFrom Method (TextReader, Int32)

Reads a SEM almanac from the specified reader.

Namespace:  AGI.Foundation.Navigation.DataReaders
Assembly:  AGI.Foundation.Navigation (in AGI.Foundation.Navigation.dll) Version: 25.1.421.0 (25.1.421.0)
Syntax
Copy
public static SemAlmanac ReadFrom(
	TextReader reader,
	int rolloverCount
)

Parameters

reader
Type: System.IO.TextReader
The reader from which to read the almanac.
rolloverCount
Type: System.Int32
The number of times the GPS week counter had rolled over when this almanac was created. See below for more information.

Return Value

Type: SemAlmanac
The almanac read from the stream.
Exceptions
ExceptionCondition
ArgumentNullException Thrown when reader is null.
InvalidDataException Thrown when the SEM almanac data has an invalid format.
Remarks

The following list represents the rollover dates for the GPS week parameter. On or after the date listed below, you will need to use the specified rollover count.

DateRollover Count
January 6, 19800
August 22, 19991
April 7, 20192
November 21, 20383
July 7, 20584

To compute the rollover count for a given date, construct a GlobalPositioningSystemDate and use the value of RolloverCount.

See Also