25.11.2014 Views

Heads-Up Display Modes 35 - Metaboli

Heads-Up Display Modes 35 - Metaboli

Heads-Up Display Modes 35 - Metaboli

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

70 Sensors<br />

4.1. F-15C Eagle Radar <strong>Modes</strong><br />

4.101 Range While Search (RWS) Mode<br />

RWS mode is the F-15C’s primary, long-range search mode. The pilot specifies a<br />

maximum scan range (10, 20, 40, 80, or 160 nautical miles) and chooses the<br />

height and width of the scan pattern. The radar displays targets found within that<br />

volume of airspace, but does not provide detailed information about any given<br />

contact.<br />

The VSD shows a top-down view of the sky, with the bottom line representing the<br />

aircraft’s position and the top line representing the maximum search range (20, 40,<br />

60, 80, or 160 nautical miles away). Contacts appear on the VSD based on their<br />

range; the closer they are, the farther down the display they appear. The VSD<br />

search range automatically adjusts to a lower or higher setting as contacts<br />

approach the bottom or top edges, respectively. <strong>Up</strong> to 16 contacts can appear<br />

simultaneously on the VSD. The radar automatically issues an IFF (Identify Friend<br />

or Foe) query when it detects a contact. Friendly contacts appear as circles;<br />

hostile and unidentified contacts are shown as rectangles.<br />

The left edge of the VSD describes the height of the scan pattern, called the<br />

elevation. The height of the elevation is measured in 2.5-degree units called bars.<br />

The elevation may be set to 1, 2, 4, 6, or 8 bars in height. The two circles on the<br />

left side of the VSD move, representing the size of the elevation scan. The<br />

numbers next to the circles indicate the upper and lower altitudes of the scan<br />

pattern at the selected search range. Additionally, the entire scan pattern may be<br />

moved 30 degrees above or below the aircraft’s center line. The elevation caret<br />

moves up and down indicating the current elevation of the radar antenna as it<br />

moves through the scan pattern.<br />

The lower edge of the<br />

VSD shows several pieces<br />

of information. The<br />

aircraft’s ground speed (G)<br />

and true airspeed (T)<br />

appears below the VSD.<br />

The elevation bar selection<br />

appears in the lower-left<br />

corner of the VSD. The<br />

radar automatically<br />

interweaves high and<br />

medium Pulse Repetition<br />

Frequency (PRF) pulses<br />

through the scan pattern,<br />

displaying the current PRF<br />

value (HI, MED, or LOW)<br />

RWS Mode<br />

next to the elevation bar<br />

setting.<br />

The bottom edge of the VSD also shows the scan pattern’s width, called the<br />

azimuth. The azimuth may be set to either +/- 30° or +/- 60° wide. The circles<br />

along the bottom of the VSD move to indicate the current width of the radar scan<br />

pattern, and the azimuth caret moves between the circles, indicating the current<br />

horizontal position of the radar antenna.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!