AcqData Object

The AcqData object is used when creating Improved Inter-Range Vector (IIRV) and Extended Precision Vector (EPV) messages using the Spacecraft.IIRV(AcqData1) or Spacecraft.EPV(AcqData1) methods. The AcqData object contains various information used to build this string message, including the type of vector and the reference coordinate system, which is combined with the Spacecraft state vector (position and velocity) at a given epoch, as well as additional spacecraft properties. The IIRV and EPV formats are specified by the “Tracking and Acquisition Handbook for the Spaceflight Tracking and Data Network”, October 1994.

To report the IIRV or EPV to an output file, the “as Binary” and “without linefeed” options should be used, in order to ensure properly formatted line endings. For example:

Available In Editions:

Timing Precision Mode

This page describes functionality in millisecond timing precision mode. Millisecond timing precision mode is deprecated and will be removed in a future release. We recommend that you migrate your Mission Plans to nanosecond timing precision mode.

Name	Description	Attributes
CommentLine1	An optional 60-byte free-text line for additional information related to the state vector contained in the EPV message. This field should contain all ASCII blanks when not used.	Type: String Access: Read/Write
CommentLine2	An optional 60-byte free-text line for additional information related to the state vector contained in the EPV message. This field should contain all ASCII blanks when not used.	Type: String Access: Read/Write
CommentLine3	An optional 60-byte free-text line for additional information related to the state vector contained in the EPV message. This field should contain all ASCII blanks when not used.	Type: String Access: Read/Write
CoordinateSystem	This property is used to generate IIRV.	Type: Variable Access: Read/Write
Counter	This property must be incremented for each vector in a set of vector data on a per-station per-transmission basis. This is not automatic and must be done manually within the Mission Sequence. This property is also referred to as the Sequence Number. This property is used to generate IIRV and EPV.	Type: Variable Access: Read/Write
DataType	This property is used to generate IIRV and EPV.	Type: Variable Access: Read/Write
DeclaredName	The name of the object as declared.	Type: String Access: Read-Only
DestinationRouter	The destination routing indicator. Specifies the site from which the message was generated. If the message is for more than one station, this field should contain the word "MANY". This property is used to generate IIRV and EPV.	Type: String Access: Read/Write
DragScaleFactor	The dimensionless drag scaling property, d. The effective drag coefficient is given by Cd(1+d). The implied decimal point is five places from the right. This value is displayed on Line 8 of the EPV report. This property is used to generate EPV.	Type: Variable Access: Read/Write
ElementTypes	This property is used to generate EPV.	Type: Variable Access: Read/Write
GeoMagIndex	The dimensionless geomagnetic activity index, Kp or Ap, at epoch. The implied decimal point is two places from the right. This value is displayed on Line 8 of the EPV report. This property is used to generate EPV.	Type: Variable Access: Read/Write
GeoMagParm	The geomagnetic activity index type. This property is used to generate EPV.	Type: Variable Access: Read/Write
Header	This property is not used.	Type: Variable Access: Read/Write
LineTermination	This property is used to control what characters to add to the end of a line of a IIRV or EPV. In Windows, lines are terminated with a Carriage Return + Line Feed (CR+LF) Sequence, this is what tells editors like notepad.exe to start a new line for subsequent text. The standard AcqData format uses a (CR+CR+LF+LF) format.	Type: Variable Access: Read/Write
MessageClass	This property is used to generate IIRV and EPV. For IIRV, this information is written into Line 1.	Type: Variable Access: Read/Write
MessageID	A unique 7-character number (0000001 to 9999999) used to reference this message. This property is used to generate IIRV and EPV. For IIRV, this information is written into Line 1.	Type: Variable Access: Read/Write
Name	The name displayed for this object in output windows such as views, plots, and reports.	Type: String Access: Read/Write
ObjectId	The unique identifier for the object.	Type: Variable Access: Read-Only
ObjectType	The type of the object.	Type: String Access: Read-Only
OriginatorCode	The originator identification. Alphabetic character that identifies the originator of message. This property is used to generate IIRV and EPV.	Type: String Access: Read/Write
SatelliteIDCode	The Support Identification Code or Satellite ID Code. Also known as the SIC. Should be four numeric characters. This property is used to generate IIRV and EPV.	Type: Variable Access: Read/Write
SolarFlux	Exospheric temperature, Tc, at epoch in units of degrees Kelvin with resolution to the nearest unit or of F10.7 solar flux at epoch in units of 10-22 W/m^2/Hz with resolution to the nearest tenth of a unit. The implied decimal place for the F10.7 solar flux is one place from the right. This field will contain all zeros when not used. This value is displayed on Line 8 of the EPV report. This property is used to generate EPV.	Type: Variable Access: Read/Write
SolarParm	This value is displayed on Line 8 of the EPV report. This property is used to generate EPV.	Type: Variable Access: Read/Write
SourceRouter	The originator router indicator. This property is used to generate IIRV and EPV.	Type: String Access: Read/Write
VectorType	This property is used to generate IIRV and EPV.	Type: Variable Access: Read/Write
VehicleIDCode	The Vehicle Identification Code. Should be two numeric characters (01-99). Defines the specific element of the SIC to be referenced. Example: for NASA Terra/AM, NASA Aqua/PM, and NASA Aura/CHEM, this field is filled with 01. This property is used to generate IIRV and EPV.	Type: Variable Access: Read/Write

AcqData Object

Description

Available In Editions:

Timing Precision Mode