Link Information Variants | Data Provider Elements
Link Information
Link information provides the link budget for a single access between a transmitter and a receiver.Data Provider Variant: Access
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 Elements
| Name | Dimension | Type | Description |
|---|---|---|---|
| Time | Date | Real Number or Text | Time. |
| Strand Name | Unitless | Text | The strand name. |
| Link Name | Unitless | Text | The strand name listed as from the receiver to the transmitter. |
| Beam ID | Unitless | Text | Reports out the unique Beam ID assigned to each new beam which can consist of any combination of characters. A default ID will be assigned to a new beam when you insert one, as well as to a copy that you create via duplication. |
| Xmtr Beam ID | Unitless | Text | Reports out the unique Beam ID assigned to each new beam of a multibeam type transmitter which can consist of any combination of characters. A default ID will be assigned to a new beam when you insert one, as well as to a copy that you create via duplication. |
| Xmtr Power | Power | Real Number | The RF power output of the transmitter as measured at the input to the antenna. This is a user selectable value. |
| Xmtr Azimuth | 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. |
| Xmtr Elevation | 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. |
| Xmtr Gain | 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. When using a Multibeam Transmitter with the Beam Selection Strategy set to Aggregate Active Beams, the Xmtr Gain element represents an effective (not aggregate) gain that weighs the contribution of each beam in the link direction according to its transmitted power. |
| 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. |
| Xmtr EIRP Intensity | PowerIntensity | Real Number | Equivalent to EIRP over 4PI. |
| IBO | Ratio | Real Number | In a power amplifier, Input BackOff (IBO) is a measure of how far you must reduce the input power in order to receive the desired output linearity and power. |
| OBO | Ratio | Real Number | Output BackOff (OBO) is the reduction in power applied to a power amplifier to minimize the effect of any intermodulation products created by modulated carriers. |
| COverIm | Ratio | Real Number | The process of modulation creates higher order intermodulation products. The Carrier to Intermod ratio (C/Im) is a power ratio between the Carrier and Intermodulation components. |
| Range | Distance | Real Number | The range (i.e., distance between the primary and secondary object) at the given time. |
| Free Space Loss | Ratio | Real Number | Loss due to propagation through free space. |
| Atmos Loss | Ratio | Real Number | Loss calculated by the selected atmosphere model. |
| UrbanTerres Loss | Ratio | Real Number | Loss calculated by the selected Urban and Terrestrial model. |
| Rain Loss | Ratio | Real Number | Loss calculated by the selected rain model. |
| CloudsFog Loss | Ratio | Real Number | Loss calculated by the Clouds and Fog model. |
| TropoScintill Loss | Ratio | Real Number | Loss calculated by the troposphere Scintillation model. |
| IonoFading Loss | Ratio | Real Number | Loss calculated by the Ionospheric Propagation Fading Loss Model. |
| UserCustomA Loss | Ratio | Real Number | Loss calculated by custom loss scripting plugin model A, written in VBscript or MATLAB. |
| UserCustomB Loss | Ratio | Real Number | Loss calculated by custom loss scripting plugin model B, written in VBscript or MATLAB. |
| UserCustomC Loss | Ratio | Real Number | Loss calculated by custom loss scripting plugin model C, written in VBscript or MATLAB. |
| Prop Loss | Ratio | Real Number | The total propagation loss computed across all enabled propagation models. |
| Rcvd. Frequency | 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. |
| Freq. Doppler Shift | Frequency | Real Number | The frequency Doppler shift is the offset in frequency between the transmitted frequency and the received frequency. This value is zero for auto tracked receivers. |
| Bandwidth Overlap | 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. |
| Rcvd. Iso. Power | 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. |
| Carrier Power at Rcvr Input | 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. |
| Flux Density | PowerFluxDensity | Real Number | The power from the desired transmitter crossing a unit area normal to the direction of wave propagation. |
| Rcvr Azimuth | 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. |
| Rcvr Elevation | 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. |
| Rcvr Gain | Ratio | Real Number | Receiver Gain is the antenna gain (in dBi) of the receiver which is dependent on the antenna type used. |
| Rcvr Beam ID | Unitless | Text | Reports out the unique Beam ID assigned to each new beam of a multibeam type receiver which can consist of any combination of characters. A default ID will be assigned to a new beam when you insert one, as well as to a copy that you create via duplication. |
| Tatmos | Temperature | Real Number | Tatmos is the antenna noise temperature component attributed to the gaseous absorption model. |
| TUrbanTerres | Temperature | Real Number | 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. |
| TcloudsFog | Temperature | Real Number | The noise temperature from the Cloud and Fog model. |
| TtropoScintill | Temperature | Real Number | The noise temperature from the Troposhperic Scintillation model. |
| TionoFading | Temperature | Real Number | The noise temperature from the Ionospheric Propagation Fading Loss Model. |
| TuserCustomA | Temperature | Real Number | TuserCustomA is the antenna noise temperature component attributed to user defined custom loss model A. |
| TuserCustomB | Temperature | Real Number | TuserCustomB is the antenna noise temperature component attributed to user defined custom loss model B. |
| TuserCustomC | Temperature | Real Number | TuserCustomC is the antenna noise temperature component attributed to user defined custom loss model C. |
| Tsun | Temperature | Real Number | Tsun is the antenna noise temperature component attributed to the sun. |
| 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. |
| 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. |
| Tantenna | Temperature | Real Number | Tantenna is the antenna noise temperature which is the sum of all the noise source components. |
| Texternal | Temperature | Real Number | The noise temperature specified by the external noise temperature file. |
| Tother | Temperature | Real Number | Tother is the antenna noise temperature component attributed to other antenna noise sources. |
| Tplugin | Temperature | Real Number | Loss calculated by the selected atmosphere model. |
| 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. |
| Pol. Rel. Angle | Angle | Real Number or Text | The angle corresponding to the relative mismatch between the transmitted signal polarization and the receiver polarization. |
| Polarization Effic | Ratio | Real Number | The polarization match between the transmitted signal polarization and the receiving antenna (or in case of Simple and Medium models implied antenna) polarization. It is computed on a scale of 0 - - 1. The value of 1.0 represents the perfect match between the transmitter and the receiver polarizations. On the opposite end of the scale, the value of 0.0 represents a perfect mismatch. STK also provides an option to model Cross Polarization Leakage value. The polarization mismatch value cannot drop below the user specified Cross Pol Leakage value. |
| 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. |
| 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 Tot. | SpectralDensity | Real Number | The composite value of the carrier to noise density ratio (C/No) across all hops of an analog bent pipe communications link where C is the carrier power and No = kT (Boltzmann's constant x system temperature) is the noise density. Note that C/No is equivalent to C/N with a normalized Bandwidth (B=1). |
| C/(No+Io) | SpectralDensity | Real Number | The carrier to noise-plus-interference density ratio (C/(No+Io)), where C is the carrier power, No = kT (Boltzmann's constant * system temperature), and Io = interference power spectral density. |
| C/(No+Io) Tot. | SpectralDensity | Real Number | The composite value of the carrier to noise-plus-interference density ratio (C/No+Io) across all hops of an analog bent pipe communications link where C is the carrier power, No = kT (Boltzmann's constant x system temperature) is the noise density, and and Io = interference power spectral density. Note that C/(No+Io) is equivalent to C/(N+I) with a normalized Bandwidth (B=1). |
| Bandwidth | Bandwidth | Real Number | Bandwidth is the Receiver Bandwidth. |
| 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 Tot. | Ratio | Real Number | The composite value of the carrier to noise ratio (C/N) across all hops of an analog bent pipe communications link where C is the carrier power and N equals kTB (Boltzmann's constant x system temperature x bandwidth) is the noise power. |
| C/(N+I) | Ratio | Real Number | The carrier to noise-plus-interference ratio (C/(N+I)), where C is the carrier power, N = kTB (Boltzmann's constant * system temperature * bandwidth), and I = interference power. |
| C/(N+I) Tot. | Ratio | Real Number | The composite value of the carrier to noise-plus-interference ratio (C/N+I) across all hops of an analog bent pipe communications link, where C is the carrier power, N equals kTB (Boltzmann's constant x system temperature x bandwidth) is the noise power, and I = interference power. |
| C/I | Ratio | Real Number | C/I is the carrier power from the desired signal over the sum of all interferer powers. |
| DeltaT/T | Ratio | Real Number | The ratio of interference power spectral density Io and receiver noise spectral density No. |
| 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 Tot. | Ratio | Real Number | The composite value of energy per bit to noise ratio (Eb/No) across all hops of an analog bent pipe communications link where Eb is the energy per bit and No = kT (Boltzmann's constant * system temperature). |
| Eb/(No+Io) | Ratio | Real Number | The energy per bit to noise-plus-interference ratio (Eb/(No+Io)), where Eb is the energy per bit, No = kT (Boltzmann's constant * system temperature), and Io = interference power spectral density. |
| Eb/(No+Io) Tot. | Ratio | Real Number | The composite value of energy per bit to noise-plus-interference ratio (Eb/No) across all hops of an analog bent pipe communications link, where Eb is the energy per bit, No = kT (Boltzmann's constant * system temperature), and Io = interference power spectral density. |
| 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 Tot. | Unitless | Real Number | Bit Error Rate (BER) Total is the probability that a bit is in error (i.e., a zero is transmitted but a one is received) across all hops of an analog bent pipe communications link or a digital repeater communications link. 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+I | Unitless | Real Number | Bit error rate in the presence of interference (BER+I) is the probability that a bit is in error (i.e. a zero is transmitted but a one is received) in the interference environment. The BER+I 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+I given an Eb/(No+Io). 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+I Tot. | Unitless | Real Number | The total Bit Error Rate (BER) in the presence of interference is the probability that a bit is in error (i.e., a zero is transmitted but a one is received) across all hops of an analog bent pipe communications link or a digital repeater communications link in the interference environment. 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) | 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) Tot. | 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) across all hops of an analog bent pipe communications link or a digital repeater communications link. 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+I) | Unitless | Real Number | The logarithm base 10 of the probability that, in the presence of interferers, 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+I) Tot. | Unitless | Real Number | The logarithm base 10 of the probability that, in the presence of interferers, a bit is in error (i.e., a zero is transmitted but a one is received) across all hops of an analog bent pipe communications link or a digital repeater communications link. 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. |
| Link Margin | Ratio | Real Number | The computed value that indicates by how much the link meets, exceeds, or fails to meet the users link budget requirements. |
| Link Margin Tot. | Ratio | Real Number | The computed value that indicates by how much the total end-to-end link meets, exceeds, or fails to meet the users link budget requirements. If the link is a single hop, this will be equivalent to the Link Margin. |
| Link Margin Type | Unitless | Text | The user-selected type of link margin being considered. Included in the data provider for your convenience. |
| Link Margin Value | Unitless | Real Number | The user-selected threshold value of the link margin being considered. Included in the data provider for your convenience. Note: The dimension of the Link Margin Value depends on the selected Link Margin Type. The dimensions for the Link Margin Value are: BER - Unitless, C/N - RatioUnit, C/No - SpectralDensityUnit, Eb/No - RatioUnit, Flux Density - PowerFluxDensityUnit, RIP - PowerUnit, and Rcvd Carrier Power - PowerUnit. |
| Propagation Delay | 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. |
| Propagation Distance | Distance | Real Number | The distance of the physical link medium between a transmitter and a receiver for which a signal will travel. |
| Spectral Flux Density | 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). |
| IonosphericTEC | Unitless | Real Number | Loss calculated by the selected atmosphere model. |