Interference Information
Interference information gives link budget information from each interferer to each receiver in the CommSystem.Available for these objects: CommSystem
Type: Time-varying data. May supply data with duplicate times. Intended to be used only with elements from this same data provider.
Availability: Reports
Pre-data required: "<TruncObjectPath>" - e.g. "Satellite/Sat1/Receiver/Receiver1"
Data Provider Elements
| Name | Dimension | Type | Description |
|---|---|---|---|
| Time | Date | Real Number or Text | Time. |
| Xmtr Name | Unitless | Text | Name of the Transmitter used in the link. |
| Rcvr Name | Unitless | Text | Name of the Receiver used in the link. |
| Interferer Name | Unitless | Text | The interferer name is the path and name of the interferer object(s) in the CommSystem. |
| Link To ID | Unitless | Integer | Refers to the ID of the transmitter in the link analysis. |
| IF Source ID | Unitless | Integer | IF source ID refers to the ID of the interferer(s) in the CommSystem. |
| Multibeam Antenna Beam-ID | Unitless | Text | Refers to the ID of the beam within the Multibeam Transmitter used in the link analysis. |
| 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 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. |
| 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 Azimuth - Phi | Angle | 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. |
| Xmtr Elevation - Theta | Angle | Real Number or Text | The transmitter elevation (Theta) is the angle between the transmitter antenna bore-sight vector and the link vector. |
| Rcvr Azimuth - Phi | Angle | 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. |
| Rcvr Elevation - Theta | Angle | Real Number or Text | The receiver elevation (Theta) is the angle between the receiver antenna bore-sight vector and the link vector. |
| 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. |
| 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. |
| Power At Rcvr Input | Power | Real Number | The power at the receiver after the receiver antenna gain is added (in dBW). It is equal to the EIRP in the receiver direction with all the channel losses as well as the bandwidth overlap and receiver gain applied. |
| C/I | Ratio | Real Number | In the Interference Information data provider, C/I is the carrier power from the desired signal over the individual interferer power. Note that the Link Information data provider defines C/I as the carrier power from the desired signal over the sum of all interferer powers. If only one interferer is part of the CommSystem, the two data providers will report the same value for C/I. |
| 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 NormGain | Ratio | Real Number | The normalized gain of the receiver is the ratio of the gain in the link direction to the max gain of the receiver's antenna. |
| Rcvr Loss | Ratio | Real Number | Receiver loss is the propagation loss through the channel between the transmitter and receiver. |
| 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. |
| Pwr Flux Density | PowerFluxDensity | Real Number | The interference power from an individual interference source, crossing a unit area normal to the direction of wave propagation and computed over a reference bandwidth of either 1 MHz, 40 kHz, 4 kHz, or 1 Hz. See "Power Flux Density Technical Notes". |
| 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 can not drop below the user specified Cross Pol Leakage value. |
| Multibeam Xmtr Antenna Beam-ID | Unitless | Text | Unique ID for beam of a multibeam antenna. |
| 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. |
| Flux Density | PowerFluxDensity | Real Number | The power from the desired transmitter crossing a unit area normal to the direction of wave propagation. |
| 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). |