Radar Environment - VOACAP
Provides the user with additional radar forward and return link information Report Elements. These are report elements that pertain to the Skywave propagation path direction rather than the straight-line path direction. The report elements associated from the transmit antenna through the propagation channel and to the target antenna, and from the target through the propagation channel and to the receiver should be utilized in typical OTH HF radar reports (e.g. transmit angles/gains, propagation loss/ranges, receive angles/gains).Available for these objects: Access
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 step of the simulation |
| Fwd VOACAP Loss | Ratio | Real Number | The loss reported by VOACAP for the transmitter-to-target link (includes freespace loss and antenna gains). |
| Fwd Skywave Range | Distance | Real Number | Transmitter-to-target range of the Skywave signal path. |
| Fwd Skywave Loss | Ratio | Real Number | Propagation loss for the transmitter-to-target link Skywave signal path (doesn’t include FSL). |
| Fwd Skywave Free Space Loss | Ratio | Real Number | The free space loss for the range associated with the transmitter-to-target Skywave signal path. |
| Fwd Skywave Prop Delay | SmallTime | Real Number | Propagation delay of the Skywave signal path for the transmitter-to-target link. |
| Fwd Skywave Mode | Unitless | Text | The most reliable mode of signal propagation for the transmitter-to-target link. |
| Fwd Reliability | Percent | Real Number | The transmitter-to-target link circuit reliability. |
| Fwd Reliable Frequency | Frequency | Real Number | The most reliable frequency for the transmitter-to-target link. |
| Fwd Skywave Transmit Elevation | Angle | Real Number or Text | Transmit elevation angle of the Skywave signal path for the transmitter-to-target link. This is the elevation angle of departure at the transmitting radar. |
| Fwd Skywave Transmit Azimuth | Angle | Real Number or Text | Transmit azimuth angle of the Skywave signal path for the transmitter-to-target link. This is the azimuth angle of departure at the transmitting radar. |
| Fwd Skywave Transmit Gain | Ratio | Real Number | Transmit antenna gain in the Skywave direction for the transmitter-to-target link. |
| Fwd Skywave Receive Elevation | Angle | Real Number or Text | Receive elevation angle of the Skywave signal path for the transmitter-to-target link. This is the elevation angle of arrival at the target. |
| Fwd Skywave Receive Azimuth | Angle | Real Number or Text | Receive azimuth angle of the Skywave signal path for the transmitter-to-target link. This is the azimuth angle of arrival at the target. |
| Fwd Skywave Receive Gain | Ratio | Real Number | RCS of the target in the Skywave direction of arrival. |
| Rtn VOACAP Loss | Ratio | Real Number | The loss reported by VOACAP for the target-to-receiver link (includes freespace loss and antenna gains). |
| Rtn Skywave Loss | Ratio | Real Number | Propagation loss for the target-to-receiver link Skywave signal path (doesn’t include FSL). |
| Rtn Skywave Range | Distance | Real Number | Target-to-receiver range of the Skywave signal path. |
| Rtn Skywave Free Space Loss | Ratio | Real Number | Propagation loss for the target-to-receiver link Skywave signal path (doesn’t include FSL). |
| Rtn Skywave Prop Delay | SmallTime | Real Number | Propagation delay of the Skywave signal path for the target-to-receiver link. |
| Rtn Skywave Mode | Unitless | Text | The most reliable mode of signal propagation for the target-to-receiver link. See MODE for more detail. |
| Rtn Reliability | Percent | Real Number | The target-to-receiver link circuit reliability. |
| Rtn Reliable Frequency | Frequency | Real Number | The most reliable frequency for the target-to-receiver link. |
| Rtn Skywave Transmit Elevation | Angle | Real Number or Text | Transmit elevation angle of the Skywave signal path for the target-to-receiver link. This is the elevation angle of departure at the target. |
| Rtn Skywave Transmit Azimuth | Angle | Real Number or Text | Transmit azimuth angle of the Skywave signal path for the target-to-receiver link. This is the azimuth angle of departure at the target. |
| Rtn Skywave Transmit Gain | Ratio | Real Number | Transmit antenna gain in the Skywave direction for the target-to-receiver link. |
| Rtn Skywave Receive Elevation | Angle | Real Number or Text | Receive elevation angle of the Skywave signal path for the target-to-receiver link. This is the elevation angle of arrival at the receiving radar. |
| Rtn Skywave Receive Azimuth | Angle | Real Number or Text | Receive azimuth angle of the Skywave signal path for the target-to-receiver link. This is the azimuth angle of arrival at the receiving radar. |
| Rtn Skywave Receive Gain | Ratio | Real Number | Receive antenna gain in the Skywave direction for the target-to-receiver link. |
| Fwd Link Skywave Doppler-Primary (Xm-Sky-Tgt) | Frequency | Real Number | The Fwd Link Skywave Doppler-Primary shift is the offset in frequency between the transmitted frequency and the received frequency at the target for the signal path from the transmitter, off the ionosphere, and then to the target. This path could include one or more hops. |
| Fwd Link Skywave Doppler-Secondary (Xm-SkyGnd-Tgt) | Frequency | Real Number | The Fwd Link Skywave Doppler-Secondary shift is the offset in frequency between the transmitted frequency and the received frequency at the target for the signal path from the transmitter, off the ionosphere, off the ground close to the target,and then to the target. This path could include one or more hops. |
| Rtn Link Skywave Doppler-Primary (Tgt-Sky-Rc) | Frequency | Real Number | The Rtn Link Skywave Doppler-Primary shift is the offset in frequency between the reflected frequency off the target and the received frequency back at the radar receiver for the signal path from the target, off the ionosphere, and then to the radar receiver. This path could include one or more hops. |
| Rtn Link Skywave Doppler-Secondary (Tgt-GndSky-Rc) | Frequency | Real Number | The Rtn Link Skywave Doppler-Secondary shift is the offset in frequency between the reflected frequency off the target and the received frequency back at the radar receiver for the signal path from the target, off the ground near the target, off the ionosphere, and then to the radar receiver. This path could include one or more hops. |
| Skywave Doppler-PrimaryPrimary (Xm-Sky-Tgt-Sky-Rc) | Frequency | Real Number | The Skywave Doppler-PrimaryPrimary shift is the offset in frequency between the transmitted frequency and the received frequency for the signal path from the transmitter, off the ionosphere, off the target, off the ionosphere, and then back to the radar receiver. This path could include one or more hops both to and from the target. |
| Skywave Doppler-PrimarySecondary (Xm-Sky-Tgt-GndSky-Rc) | Frequency | Real Number | The Skywave Doppler-PrimarySecondary shift is the offset in frequency between the transmitted frequency and the received frequency for the signal path from the transmitter, off the ionosphere, off the target, off the ground near the target, off the ionosphere, and then back to the radar receiver. This path could include one or more hops both two and from the target. |
| Skywave Doppler-SecondaryPrimary (Xm-SkyGnd-Tgt-Sky-Rc) | Frequency | Real Number | The Skywave Doppler-SecondaryPrimary shift is the offset in frequency between the transmitted frequency and the received frequency for the signal path from the transmitter, off the ionosphere, off the ground near the target, off the target, off the ionosphere, and then back to the radar receiver. This path could include one or more hops both to and from the target. |
| Skywave Doppler-SecondarySecondary (Xm-SkyGnd-Tgt-GndSky-Rc) | Frequency | Real Number | The Skywave Doppler-SecondarySecondary shift is the offset in frequency between the transmitted frequency and the received frequency for the signal path from the transmitter, off the ionosphere, off the ground near the target, off the target, off the ground near the target, off the ionosphere, and then back to the radar receiver. This path could include one or more hops both to and from the target. |
| Tgt Rcvd Freq-Primary (Xm-Sky-Tgt) | Frequency | Real Number | The frequency received at the target after going from the radar transmitter, off the ionosphere, and to the target. The path to the target could include one or more hops. |
| Tgt Rcvd Freq-Secondary (Xm-SkyGnd-Tgt) | Frequency | Real Number | The frequency received at the target after going from the radar transmitter, off the ionosphere, off the ground near the target, and then to the target. The path to the target could include one or more hops. |
| Rcvd Freq-PrimaryPrimary (Xm-Sky-Tgt-Sky-Rc) | Frequency | Real Number | The frequency received back at the radar receiver after going from the radar transmitter, off the ionosphere, off the target, back off the ionosphere, and back to the radar receiver. The paths to and from the target could include one or more hops. |
| Rcvd Freq-PrimarySecondary (Xm-Sky-Tgt-GndSky-Rc) | Frequency | Real Number | The frequency received back at the radar receiver after going from the radar transmitter, off the ionosphere, off the target, off the ground near the target, off the ionosphere, and back to the radar receiver. The paths to and from the target could include one or more hops. |
| Rcvd Freq-SecondaryPrimary (Xm-SkyGnd-Tgt-Sky-Rc) | Frequency | Real Number | The frequency received back at the radar receiver after going from the radar transmitter, off the ionosphere, off the ground near the target, off the target, back off the ionosphere, and back to the radar receiver. The paths to and from the target could include one or more hops. |
| Rcvd Freq-SecondarySecondary (Xm-SkyGnd-Tgt-GndSky-Rc) | Frequency | Real Number | The frequency received back at the radar receiver after going from the radar transmitter, off the ionosphere, off the ground near the target, off the target, off the ground near the target, off the ionosphere, and back to the radar receiver. The paths to and from the target could include one or more hops. |
| FDOA | Frequency | Real Number | Frequency difference of arrival |