SemAlmanac.ReadFrom Method (String, Int32) |
Reads a SEM almanac from the specified file.
Namespace:
AGI.Foundation.Navigation.DataReaders
Assembly:
AGI.Foundation.Navigation (in AGI.Foundation.Navigation.dll) Version: 25.1.421.0 (25.1.421.0)
Syntaxpublic static SemAlmanac ReadFrom(
string fileName,
int rolloverCount
)
Public Shared Function ReadFrom (
fileName As String,
rolloverCount As Integer
) As SemAlmanac
public:
static SemAlmanac^ ReadFrom(
String^ fileName,
int rolloverCount
)
static member ReadFrom :
fileName : string *
rolloverCount : int -> SemAlmanac
Parameters
- fileName
- Type: System.String
The name of the file 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:
SemAlmanacThe almanac read from the file.
Exceptions
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.
Date | Rollover Count |
---|
January 6, 1980 | 0 |
August 22, 1999 | 1 |
April 7, 2019 | 2 |
November 21, 2038 | 3 |
July 7, 2058 | 4 |
To compute the rollover count for a given date, construct a
GlobalPositioningSystemDate
and use the value of
RolloverCount.
See Also