Basic Properties Variants | Data Provider Elements

Basic Properties

Reports all the parameters associated with set up of the receiver.

Data Provider Variant: Receiver

Available for these objects: Receiver

Type: Fixed data.

Availability: Reports

Data Provider Elements

Name	Dimension	Type	Description
Rcvr Model	Unitless	Text	Type of receiver model.
Number of Beams	Unitless	Real Number or Text	The number of beams modeled by the receiver. If the receiver type does not model beams (e.g., Simple Source Receiver), "N/A" is reported.
g/T	GainTempRatio	Real Number or Text	g/T = (Receiver Gain)/(System Temperature at the Receiver). The ratio of the receive antenna gain g to the total system temperature T is the "figure of merit" for the receiver (in dB/K). The figure of merit is independent of the point where it is calculated. However, the gain and system temperature must be specified at the same point. This is defined by the user as a constant for the simple receiver. For all other receiver's, the g/T value is computed for each time step and therefore "N/A" is reported.
Gain	Ratio	Real Number or Text	Antenna gain (in dBi) of the transmitter or receiver. It is dependent on the antenna type used. For medium and laser transmitters or receivers, this value is a constant defined by the user. For complex and multibeam transmitters and receivers, the maximum antenna gain for the selected antenna type or the receiver is reported. The simple transmitter or receiver model assumes an isotropic antenna and therefore reports the antenna gain as a constant 0.0 dB.
Pre-Receive GL	Ratio	Real Number or Text	The total pre-receive gains and losses defined by the user for and applied at the front end of the receiver.
Pre-Demod GL	Ratio	Real Number or Text	The total pre-demodulation gains and losses defined by the user and applied at the demodulator.
System Temperature	Unitless	Text	The system's inherent noise characteristics which either the user has defined or has allowed STK to calculate.
Constant System Temperature	Temperature	Real Number or Text	Reports out the user selected constant system temperature value.
Receiver Noise Figure	Ratio	Real Number or Text	The noise figure represents the contribution to the total system noise by the gain stages of the receiver. It can be thought of as a factor that describes the noise level in a receiver relative to that in a theoretically perfect receiver. The noise figure is always greater than 0 dB.
Noise Figure	Ratio	Real Number or Text	The noise figure represents the contribution to the total system noise by the gain stages of the receiver. It can be thought of as a factor that describes the noise level in a receiver relative to that in a theoretically perfect receiver. The noise figure is always greater than 0 dB.
Transmission Line Loss	Ratio	Real Number or Text	The transmission line loss is the loss of the transmission line between the antenna and receiver.
Transmission Line Temperature	Temperature	Real Number or Text	The transmission line temperature is the physical temperature of the receiver transmission line.
Antenna Noise	Unitless	Text	Noise that the antenna receivers from radiating bodies within its radiation pattern. Given as a temperature, antenna noise is a function of the direction in which the antenna is pointing, its radiation pattern and the state of the surrounding environment.
Antenna Noise - Constant Temperature	Temperature	Real Number or Text	The antenna noise as a constant temperature, specified by the user.
Antenna Noise - External File	Unitless	Text	Reports out the filename of the external antenna noise temperature file. The antenna noise temperature can be given in a user-specified file that describes antenna noise temperature (in Kelvin) as a function of the ground elevation angle (in degrees).
Antenna Noise - Use Earth	Unitless	Text	Use the Earth as part of the calculation of the system temperature for antenna noise.
Antenna Noise - Use Sun	Unitless	Text	Use the Sun when calculating the system temperature for antenna noise.
Antenna Noise - Use Atmosphere	Unitless	Text	Use the atmosphere when calculating the system temperature for antenna noise. Available only for a Facility, Place, or Target.
Antenna Noise - Use Rain	Unitless	Text	Use rain when calculating the system temperature for antenna noise. Available only for a Facility, Place, or Target.
Antenna Noise - Use Cosmic	Unitless	Text	Use the cosmic background noise when calculating the system temperature for antenna noise. Available only for Vehicles.
Antenna Noise - Other	Temperature	Real Number or Text	Allows the user to enter noise from other sources for the calculation of the system temperature for antenna noise.
Polarization	Unitless	Text	Polarization shows which polarization type has been selected for the antenna. Polarization is a property of an electromagnetic wave that describes the orientation of the electric field vector with reference to the antenna's orientation. The three basic types of polarization are linear, elliptical and circular. In special cases of linear polarization, the electrical field is aligned vertically or horizontally with reference to the antenna. Circular polarization can be right-handed or left-handed. STK computes the polarization match, which is a quantity between a transmitter and a receiver based on their polarization types, positions, and attitudes. If a receiver or transmitter is of a single-beam type, the Model page for that communications object allows you to select among several polarization types, and, depending on the type selected, to specify one or more parameters. For multi-beam models, polarization is defined in the Modify Antenna Beam window.
Polarization - Vertical Reference Axis	Unitless	Text	Vertical reference axis specifies the axis (X, Y or Z) with respect to which the electrical field is oriented. This is applicable to linear, vertical, horizontal or elliptical polarization. Otherwise, N/A is reported.
Polarization - Tilt Angle	Angle	Real Number or Text	Tilt angle is the angle between the vertical reference axis and the x axis of the coordinate system. This is applicable to linear or elliptical polarization. Otherwise, "N/A" is reported.
Polarization - Axial Ratio	Unitless	Real Number or Text	Axial ratio is the ratio of the major to the minor axis of the polarization ellipse. This is only applicable to the elliptical polarization type.
Polarization - Cross Pol Leakage	Ratio	Real Number or Text	Whenever STK detects a complete polarization mismatch between the transmitted signal and the received signal under ideal conditions, the Cross Polarization Leakage value is applied to model the less-than-ideal real-world performance. The value, ranging from -9999.9 dB to -0.001 dB, reflects the performance of the user's system, where -9999.9 dB represents ideal conditions (no leakage).
Frequency	Unitless	Real Number or Text	Frequency that the transmitter or receiver is tuned to or operating at.
Bandwidth	Unitless	Real Number or Text	The Receiver Bandwidth.
Use Spectral Filter	Unitless	Text	The status of the spectral filter feature. If the spectral filter is enabled "True" is returned, otherwise "False" is returned.
Filter - Type	Unitless	Text	The type of filter that is selected (e.g. Butterworth).
Filter - Upper Spectral Limit	Bandwidth	Real Number or Text	The selected filter's upper spectral limit. The filter's upper limit on the power spectrum. The bandwidth limit is relative to the carrier frequency (the carrier being at zero Hz), and is specified as a positive value. The upper limit is considered to be a sharp cutoff point and the spectrum is zero beyond the limit.
Filter - Lower Spectral Limit	Bandwidth	Real Number or Text	The selected filter's lower spectral limit. The filter's lower limit on the power spectrum. The bandwidth limit is relative to the carrier frequency and is specified as a positive value. The lower limit is considered to be a sharp cutoff point and the spectrum is zero beyond the limit.
Filter - Insertion Loss	Ratio	Real Number or Text	The selected filter's insertion loss. This is a fixed signal attenuation in addition to the spectral loss computed by the filter's response characteristics.
Filter - Order	Unitless	Real Number or Text	The selected filter's order. In general, higher order filters have sharper roll-offs at the cutoff frequencies.
Filter - -3dB Cutoff Frequency	Bandwidth	Real Number or Text	The selected filter's -3dB (50 percent) filter attenuation response point.
Filter - Ripple	Ratio	Real Number or Text	The selected filter's ripple. This value represents the amount of ripple present in the filter pass and stop bands.
Filter - External Filename	Unitless	Text	The external filter filename, if an external filter type is selected.
Cable Receiver - Excess Cable Factor	Unitless	Real Number or Text	A multiplier value to the great arc distance that will be added to the great arc distance. For example, if the great arc distance between a transmitter and receiver is 1000 km and the cable between the transmitter and receiver is intended to be four times the great-arc distance, then the Extra Cable Factor would be 3.0 (resulting in an entire cable length of 4000 km).
Cable Receiver - Propagation Speed Factor	Unitless	Real Number or Text	A scale factor used when calculating the delay through the transmission medium (range = 0.0 - 1.0), which is applied to the speed of light to adjust the speed at which EM propagates through the desired medium.
Cable Receiver - BER	Unitless	Real Number or Text	Bit Error Rate is the probability that a bit is in error (e.g. a 0 is transmitted but a 1 is received). The BER is the number of bits in error divided by the total number of bits sent.