Set RF system temperature properties for receivers (Deprecated Command)
Comm <ObjectPath> SysTemp {SystemOption} <Parameters>
Note: This command was deprecated in STK 9, it should no longer be used. This command has been replaced by the Receiver command.
The Comm Connect commands were enhanced in STK 9 to make use of attributes and to simplify the format required to use these commands. For more information on using the new format see Transitioning to the New Receiver Connect Format.
The Comm SysTemp command allows you to set the system temperature properties for an RF antenna.
{SystemOptions} can be:
| {SystemOption} <Parameters> | Description |
|---|---|
| Constant <Temperature> | Use a constant system temperature. Enter the value in Scenario temperature units. |
| TransLineLoss <LineLoss> | The loss of the transmission line between the antenna and receiver, entered in dB. Valid value is between -200 and 0.0. |
| TransLineTemp <LineTemp> | The physical temperature of the receiver transmission line. Enter the value in Scenario temperature units. |
| NoiseFigure <Value> | The noise figure represents the contribution to the total system noise by the gain stages of the receiver, entered in dB. Valid value is greater than 0.0. |
| AntNoise {AntNoiseOption} |
For description of {AntNoiseOption} see table below. |
If you set the RF antenna system temperature properties to AntNoise, parameter values are as follows:
| {AntNoiseOption} | Description |
|---|---|
| Constant <Temperature> | Enter the desired constant value in Scenario temperature units. |
| Calculated {CalcOption...} | Any number of valid options can be used
in calculating antenna noise. All previous values are cleared
before setting the new values. Valid values for {CalcOption...}
are:
<Temperature> values are entered in Scenario temperature units. If using EarthTemp, you must first enter the Earth option. The Rain and External options are available only for facilities and targets. Earth, Cosmic, and EarthTemp options are available only for vehicles. Note: For more information regarding antenna noise settings see STK Help: RF Environment. |
To set the antenna noise value to be calculated for the Earth and atmosphere with a system temperature of 230.0K for the Eyes receiver:
Comm */Satellite/ERS1/Receiver/Eyes SysTemp AntNoise Calculated Earth Atmosphere 230.0
To set the transmission line loss to -30 dB for the Eyes receiver:
Comm */Satellite/ERS1/Receiver/Eyes SysTemp TransLineLoss -30.0
To set the antenna noise for the Receiver1 to be calculated using Sun, Atmosphere and Rain (Note: the Scenario RF Environment must be set to use the Rain model and Gaseous Absorption model):
Comm */Facility/Facility1/Receiver/Receiver1 Systemp AntNoise Calculated Sun Atmosphere Rain
To set the Earth temperature to a constant value of 234.0K:
Comm */Satellite/Satellite1/Receiver/Receiver2 Systemp AntNoise Calculated Earth EarthTemp 234.0
To set the values to be used to calculate antenna noise for Receiver1:
Comm */Facility/Facility1/Receiver/Receiver1 SysTemp AntNoise Calculated External "C:\antennanoise.txt" Sun Rain TropoScintillation CloudsFog Atmosphere 230.0
If activated, Connect returns an acknowledgement message.
This command belongs to the following group(s):
9.0
STK Programming Interface 11.0.1