Table Of Contents

Get Velocity (G Dataflow)

Version:
Last Modified: August 28, 2017

Returns the last calculated velocity of the specified device's onboard GPS receiver.

You can display east velocity, north velocity, and up velocity in meters per second.

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Note  

You must connect an external GPS antenna to your device to receive valid data from this function, and you must enable Mobile Mode on the device to receive non-zero velocity values. You can enable Mobile Mode using Measurement & Automation Explorer (MAX) or by using the Mobile Mode parameter of niSync Properties.

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instrument handle in

The instrument handle that you obtain from Initialize.

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error in

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

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instrument handle out

The instrument handle that you obtain from Initialize.

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error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.
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east velocity

The current east velocity, in meters per second, of the device.

Negative values represent how fast the device is traveling west. Positive values represent how fast the device is traveling east.

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north velocity

The current north velocity, in meters per second, of the device.

Negative values represent how fast the device is traveling south. Positive values represent how fast the device is traveling north.

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up velocity

The current up velocity, in meters per second, of the device.

Negative values represent how fast the device is traveling down. Positive values represent how fast the device is traveling up.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported

Web Server: Not supported in VIs that run in a web application


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