Data Provider Groups | Data Provider Elements

Parameter Set: Comm Link Information

Computes the communication link budget elements following the signal flow. It starts from the RF transmitter and follows through the link stages, such as the transmitting antenna, RF propagation environments, receiving antenna, and the receiver system. Each line of the link report corresponds to a time step. The link budget data elements are organized by the report style used to create the report.

Available for these objects: Access

Restrictions: Access - Applies to Transmitter-Receiver pairs only.

Type: Time-varying data.

Availability: Reports | Graphs | Dynamic Displays | Strip Charts

Data Provider Groups

Any Comm Link Parameter Set component owned by the object is available for use, including user defined ones. Use the Analysis Workbench listing or the Report Manager->Report Content Properties tool to determine the actual set of components that can be used for a specific object.

Name	Description
CommLinkInformation	The CommLinkInformation Parameter Set component is automatically created for an Access involving a Transmitter with a Receiver.

Data Provider Elements

Name	Dimension	Type	Description
Time	Date	Real Number or Text	Time.
XmtrPower	Power	Real Number	The RF power output of the transmitter as measured at the input to the antenna. This is a user selectable value.
XmtrPower Rate	PowerRate	Real Number	The rate of change of the transmitter power.
XmtrAzimuth	Longitude	Real Number or Text	The transmitter azimuth (Phi) is the angle between the transmitter body +x axis and the x-y projection of the link vector in the antenna coordinate system.
XmtrAzimuth Rate	AngleRate	Real Number	The rate of change of the transmitter azimuth.
XmtrElevation	Angle	Real Number or Text	The transmitter elevation (Theta) is the angle between the transmitter antenna bore-sight vector and the link vector in the antenna coordinate system.
XmtrElevation Rate	AngleRate	Real Number	The rate of change of the transmitter elevation.
XmtrGain	Ratio	Real Number	The antenna gain of the transmitter which is dependent on the antenna type selected. For transmitter models that do not have an antenna model, this is a user defined value. For the simple source transmitter, 0 dB is reported since the simple source transmitter is modeled as an isotropic radiator.
XmtrGain Rate	RatioRate	Real Number	The rate of change of the transmitter gain.
EIRP	Power	Real Number	The effective isotropic radiated power in the link direction. This value is the product of the transmitter power and the transmitter gain in the link direction with the inclusion of user defined post transmit gains and losses.
EIRP Rate	PowerRate	Real Number	The rate of change of the EIRP.
EIRPIntensity	PowerIntensity	Real Number	Transmitted radiation intensity in a solid angle of the beam (e.g., watts per ster-radians).
EIRPIntensity Rate	PowerIntensityRate	Real Number	The rate of change of EIRP intensity over time.
Range	Distance	Real Number	Range of the communications link between the transmitter and the receiver.
Range Rate	Rate	Real Number	The rate of change of the range of the communications link between the transmitter and the receiver.
FreeSpaceLoss	Ratio	Real Number	Loss due to propagation through free space.
FreeSpaceLoss Rate	RatioRate	Real Number	The rate of change of the Free Space Loss.
AtmosLoss	Ratio	Real Number	Loss calculated by the selected atmosphere model.
AtmosLoss Rate	RatioRate	Real Number	The rate of change of loss calculated by the selected atmosphere model.
UrbanTerresLoss	Ratio	Real Number	Loss calculated by the selected Urban and Terrestrial model.
UrbanTerresLoss Rate	RatioRate	Real Number	The rate of change of the loss attributed to the selected Urban and Terrestrial model.
RainLoss	Ratio	Real Number	Loss calculated by the selected rain model.
RainLoss Rate	RatioRate	Real Number	The rate of change of the rain loss.
CloudsFogLoss	Ratio	Real Number	Loss calculated by the Clouds and Fog model.
CloudsFogLoss Rate	RatioRate	Real Number	The rate of change of the CloudsFog Loss.
TropoScintillLoss	Ratio	Real Number	Loss calculated by the troposphere Scintillation model.
TropoScintillLoss Rate	RatioRate	Real Number	The rate of change of the loss attributed to the troposphere Scintillation model.
IonoFadingLoss	Ratio	Real Number	Loss calculated by the Ionospheric Propagation Fading Loss Model.
IonoFadingLoss Rate	RatioRate	Real Number	The rate of change of the Ionospheric Propagation Fading Loss Model.
UserCustomALoss	Ratio	Real Number	Loss calculated by custom loss scripting plugin model A, written in VBscript or MATLAB.
UserCustomALoss Rate	RatioRate	Real Number	The rate of change of the loss calculated by custom loss scripting plugin model A.
UserCustomBLoss	Ratio	Real Number	Loss calculated by custom loss scripting plugin model B, written in VBscript or MATLAB.
UserCustomBLoss Rate	RatioRate	Real Number	The rate of change of the loss calculated by custom loss scripting plugin model B.
UserCustomCLoss	Ratio	Real Number	Loss calculated by custom loss scripting plugin model C, written in VBscript or MATLAB.
UserCustomCLoss Rate	RatioRate	Real Number	The rate of change of the loss calculated by custom loss scripting plugin model C.
PropLoss	Ratio	Real Number	The total propagation loss computed across all enabled propagation models.
PropLoss Rate	RatioRate	Real Number	The rate of change of the total propagation loss.
RcvdFrequency	Frequency	Real Number	The received frequency is the frequency that the receiver is tuned to in order to communicate with the transmitter. This frequency may be auto-tracked or entered by the user in the receiver properties.
RcvdFrequency Rate	FrequencyRate	Real Number	The rate of change of the received frequency.
DopplerShift	Frequency	Real Number	Change of the transmitted signal frequency at the receiver antenna, due to Doppler shift arising from the relative speed between the transmitter and the receiver.
DopplerShift Rate	FrequencyRate	Real Number	The rate of change of the Doppler Shift.
BandwidthOverlap	Ratio	Real Number	The bandwidth overlap factor is the fraction (between 0 and 1) of transmitted power which is contained within the receiver's bandwidth. The amount of power received by the receiver is equal to the transmitted EIRP multiplied by the bandwidth overlap factor and taking into account any propagation losses.
BandwidthOverlap Rate	RatioRate	Real Number	The rate of change of Bandwidth overlap.
RIP	Power	Real Number	Received isotropic power is the power at the receiver before the pre-receive gains/losses and the receiver antenna gain added (in dBW). It is equal to the EIRP with all the channel losses as well as the bandwidth overlap applied.
RIP Rate	PowerRate	Real Number	The rate of change of the received isotropic power.
CarrierPowerAtRcvrInput	Power	Real Number	Carrier Power at Rcvr Input is the power at the receiver after the receiver antenna gain added (in dBW). It is equal to the EIRP with all the channel losses as well as the bandwidth overlap and receiver gain applied.
CarrierPowerAtRcvrInput Rate	PowerRate	Real Number	The rate of change of the CarrierPower at Rcvr Input.
FluxDensity	PowerFluxDensity	Real Number	The power from the desired transmitter crossing a unit area normal to the direction of wave propagation.
FluxDensity Rate	PowerFluxDensityRate	Real Number	The rate of change of the Flux Density.
RcvrAzimuth	Longitude	Real Number or Text	The receiver azimuth (Phi) is the angle between the receiver body +x axis and the x-y projection of the link vector in the antenna coordinate system.
RcvrAzimuth Rate	AngleRate	Real Number	The rate of change of the receiver azimuth.
RcvrElevation	Angle	Real Number or Text	The receiver elevation (Theta) is the angle between the receiver antenna bore-sight vector and the link vector in the antenna coordinate system.
RcvrElevation Rate	AngleRate	Real Number	The rate of change of the receiver elevation.
RcvrGain	Ratio	Real Number	Receiver Gain is the antenna gain (in dBi) of the receiver which is dependent on the antenna type used.
RcvrGain Rate	RatioRate	Real Number	The rate of change of the receiver gain.
Tatmos	Temperature	Real Number	Tatmos is the antenna noise temperature component attributed to the gaseous absorption model.
Tatmos Rate	TemperatureRate	Real Number	The rate of change of the antenna noise temperature component attributed to the gaseous absorption model.
TUrbanTerres	Temperature	Real Number	The noise temperature from the Urban and Terrestrial model.
TUrbanTerres Rate	TemperatureRate	Real Number	The rate of change of the noise temperature from the Urban and Terrestrial model.
Train	Temperature	Real Number	Train is the antenna noise temperature component attributed to the rain model.
Train Rate	TemperatureRate	Real Number	The rate of change of the antenna noise temperature component attributed to the rain model.
TcloudsFog	Temperature	Real Number	The noise temperature from the Cloud and Fog model.
TcloudsFog Rate	TemperatureRate	Real Number	The rate of change of the noise temperature from the Cloud and Fog model.
TtropoScintill	Temperature	Real Number	The noise temperature from the Troposhperic Scintillation model.
TtropoScintill Rate	TemperatureRate	Real Number	The rate of change of Tropo-scintillation noise temperature over time.
TionoFading	Temperature	Real Number	The noise temperature from the Ionospheric Propagation Fading Loss Model.
TionoFading Rate	TemperatureRate	Real Number	The rate of change of Ionospheric fading noise temperature over time.
TuserCustomA	Temperature	Real Number	TuserCustomA is the antenna noise temperature component attributed to user defined custom loss model A.
TuserCustomA Rate	TemperatureRate	Real Number	The rate of change of Noise temperature due to User CustomA loss over time.
TuserCustomB	Temperature	Real Number	TuserCustomB is the antenna noise temperature component attributed to user defined custom loss model B.
TuserCustomB Rate	TemperatureRate	Real Number	The rate of change of Noise temperature due to User CustomB loss over time.
TuserCustomC	Temperature	Real Number	TuserCustomC is the antenna noise temperature component attributed to user defined custom loss model C.
TuserCustomC Rate	TemperatureRate	Real Number	The rate of change of Noise temperature due to User CustomC loss over time.
Tsun	Temperature	Real Number	Tsun is the antenna noise temperature component attributed to the sun.
Tsun Rate	TemperatureRate	Real Number	The rate of change of Sun Noise temperature over time.
Tearth	Temperature	Real Number	Tearth is the antenna noise temperature component attributed to the earth. This is applicable only to receivers not on the ground.
Tearth Rate	TemperatureRate	Real Number	The rate of change of Earth Noise temperature over time.
Tcosmic	Temperature	Real Number	Tcosmic is the antenna noise temperature component attributed to the cosmic background. This is applicable only to receivers not on the ground.
Tcosmic Rate	TemperatureRate	Real Number	The rate of change of Cosmic Background Noise temperature over time.
Texternal	Temperature	Real Number	The noise temperature specified by the external noise temperature file.
Texternal Rate	TemperatureRate	Real Number	The rate of change of Noise temperature data, provided by user external file, over time.
Tother	Temperature	Real Number	Tother is the antenna noise temperature component attributed to other antenna noise sources.
Tother Rate	TemperatureRate	Real Number	The rate of change of Other (user entry text field) Noise temperature over time.
plugin	Temperature	Real Number	Temperature plugin.
plugin Rate	TemperatureRate	Real Number	Temperature rate plugin.
Tantenna	Temperature	Real Number	Tantenna is the antenna noise temperature which is the sum of all the noise source components.
Tantenna Rate	TemperatureRate	Real Number	The rate of change of antenna Noise temperature over time.
Tequivalent	Temperature	Real Number	The equivalent system temperature is specified by the user as a constant value or computed at each time step from the receiver system temperature parameters defined by the user.
Tequivalent Rate	TemperatureRate	Real Number	The rate of change of total System Noise temperature over time.
PolRelAngle	Angle	Real Number or Text	The angle corresponding to the relative mismatch between the transmitted signal polarization and the receiver polarization.
PolRelAngle Rate	AngleRate	Real Number	The rate of change of Polarization relative angle over time.
PolLoss	Ratio	Real Number	Polarization mismatch loss between the transmitted signal and the receiver system polarization.
PolLoss Rate	RatioRate	Real Number	The rate of change of Polarization mismatch loss over time.
g/T	GainTempRatio	Real Number	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.
g/T Rate	GainTempRatioRate	Real Number	The rate of change of receiver gain over noise temperature value (g/T) over time.
C/No	SpectralDensity	Real Number	The carrier to noise density ratio (C/No) where C is the carrier power and No = kT (Boltzmann's constant x system temperature) is the noise density. It is equivalent to C/N with a normalized Bandwidth (B=1).
C/No Rate	SpectralDensityRate	Real Number	The rate of change of received carrier power over system noise power spectral density value (C/No) over time.
Bandwidth	Bandwidth	Real Number	The Receiver Bandwidth.
Bandwidth Rate	BandwidthRate	Real Number	The rate of change of receiver bandwidth value over time.
C/N	Ratio	Real Number	The carrier to noise ratio (C/N) where C is the carrier power and N = kTB (Boltzmann's constant x system temperature x bandwidth) is the noise power.
C/N Rate	RatioRate	Real Number	The rate of change of received carrier power over system noise power value (C/No) over time.
Eb/No	Ratio	Real Number	The energy per bit to noise ratio (Eb/No) where Eb is the energy per bit and No = kT (Boltzmann's constant * system temperature).
Eb/No Rate	RatioRate	Real Number	The rate of change of received Energy per Bit over system noise power spectral density value (Eb/No) over time.
BER	Unitless	Real Number	Bit Error Rate (BER) is the probability that a bit is in error (i.e. a zero is transmitted but a one is received). The BER is the number of bits in error divided by the total number of bits sent. STK uses table lookup from a .mod file to extract a BER given an Eb/No. STK interpolates the table as necessary to determine the appropriate bit error rate for a particular bit energy level. If the bit energy is smaller than the first value in the table, the bit error rate for the first value is used. If the bit energy is larger than the last value in the table, a default bit error rate of 1.0e-30 is used to indicate no errors.
BER Rate	Unitless Per Time	Real Number	The rate of change of BER.
log(BER)	Unitless	Real Number	The logarithm base 10 of the probability that a bit is in error (i.e., a zero is transmitted but a one is received). The BER is the number of bits in error divided by the total number of bits sent. STK uses table lookup from a .mod file to extract a BER given an Eb/No. STK interpolates the table as necessary to determine the appropriate bit error rate for a particular bit energy level. If the bit energy is smaller than the first value in the table, the bit error rate for the first value is used. If the bit energy is larger than the last value in the table, a default bit error rate of 1.0e-30 is used to indicate no errors.
log(BER) Rate	Unitless Per Time	Real Number	The rate of change of receiver Log10 of BER value over time.
LinkMargin	Ratio	Real Number	The computed value that indicates by how much the link meets, exceeds, or fails to meet the users link budget requirements.
LinkMargin Rate	RatioRate	Real Number	The rate of change of receiver link margin value over time.
PropagationDelay	Time	Real Number	The amount of time required for a signal to propagate through the physical link medium. This will vary depending on the propagation distance and the type of medium.
PropagationDelay Rate	Unitless	Real Number	The rate of change of signal propagation delay value over time.
PropagationDistance	Distance	Real Number	The distance of the physical link medium between a transmitter and a receiver for which a signal will travel.
PropagationDistance Rate	Rate	Real Number	The rate of change of signal propagation distance value over time.
SpectralFluxDensity	PowerSpectralFluxDensity	Real Number	The power per unit area per unit bandwidth. The power is computed across the receiver's bandwidth as seen by the receiver's RF front end. The bandwidth is the receiver's total bandwidth. The dimension is Power / (Area * Bandwidth), and is typically represented in dBW/(m^2*Hz).
SpectralFluxDensity Rate	PowerSpectralFluxDensityRate	Real Number	The rate of change of signal spectral flux density (across receiver front end) value over time.
IonosphericTEC	Unitless	Real Number	Loss calculated by the selected atmosphere model.
IonosphericTEC Rate	Unitless Per Time	Real Number	Loss calculated by the selected atmosphere model.