Abstract: A TCAS view image format with horizontal trend for a traffic situation awareness display in a craft, having the craft represented by a center symbol, having traffic represented by position symbols that indicate by shape the horizontal heading of a craft, having the shape of the represented vehicle and varying size to represent level of traffic threat or closeness in altitude differential, having symbols that indicate altitude and trend of altitude, and having symbols that in shape and color redundantly indicate the level of traffic threat.

Abstract: A full color 3D projection display using wavelength separation which, through a combination of retarders, prisms and dichroic and polarizing coatings, takes linearly polarized red and green light of p orientation from left and right images and blue linearly polarized light of p orientation from one of the views or a common image, and presents the light for projection having green and red light of one polarization orientation for one view and red and green light of a polarization with another orientation for providing the 3D components of the image. The blue light component is presented alternately in one of both polarization orientations to be perceived with the left and right views, respectively.

Abstract: A symbol generator useful for stroke based and raster display systems provides the ability of generating ellipses and elliptical arc segments. A look-up table provides cosine and sine values for incremental angles which are multiplied by major and minor axis scale factors for a selected ellipse. Global input parameters permit rotation of all arcs and vectors to generate orthogonal projections, thereby producing 2-D and 3-D symbology.

Abstract: A method and apparatus for converting polar format radar video data into a horizontal raster format output to a TV monitor. Radar video data comprises radar video pixels each having an associated intensity value and a polar coordinate in a raster display. The TV monitor includes a display screen including a plurality of pixels wherein each pixel has a corresponding X,Y address. The apparatus and method of the invention comprises steps or apparatus for storing the radar video pixels, translating X,Y addresses into corresponding angular and radial coordinates, scanning the storage means using the translated X,Y address and interpolating a radar intensity value for the translated X,Y address. The radar video pixels are indexed by radial and angular coordinates. The scanning process includes accessing at least four radar video pixels surrounding the translated X,Y address.

Abstract: Refresh memory apparatus for use in a CRT raster display system utilizes half field storage memories for ping ponging between updating and readout. In one TV mode of operation the even and odd raster lines are stored in the respective memories and in another TV mode the top and bottom halves of the frame are stored therein. The most significant bit and least significant bit of the vertical address signals are multiplexed to control the ping pong reading and writing of the memories and are multiplexed with the remainder of the address signal to provide the read and write addresses for the memories. The multiplexers are controlled in accordance with the TV mode in which the system is operating.

Abstract: An apparatus for flicker reduction and increased writing speed into image memory in a CRT display having an interlaced scan with masking of low priority symbols. The apparatus expands or duplicates adjacent picture elements to provide redundant illumination for alternate fields, thereby providing at least two adjacent illuminated picture elements proximate to a masking image to reduce flickering during the writing of alternate fields. Writing into a single memory location commands illumination of a plurality of adjacent pixels, thereby reducing image memory writing time. The apparatus utilizes an image memory wherein video bit signals are written into only storage locations whose binary x coordinate has a predetermined first digit, and whose binary y coordinate has a predetermined first digit. Signals in storage locations whose addresses correspond to picture elements P.sub.I,J, P.sub.I-1,J, P.sub.I-1, .sub.J+1, and P.sub.

Abstract: Apparatus for providing an integrated display of flight instrument parameters on the screen of a single cathode ray tube is presented. The synthetically generated symbology provides the pilot with an integrated display of substantially all aircraft attitude and flight path command and control parameters including attitude and magnetic heading, barometric and radiometric attitude, vertical spread, critical take-off speeds, true airspeed and Mach airspeed, flight path angle, flight director path control commands, and mode annunciation for the flight director and automatic pilot systems.

Abstract: Apparatus for providing an integrated display of flight instrument parameters on the screen of a single cathode ray tube is presented. The synthetically generated symbology is equivalent to that typically provided by ten conventional electromechanical instruments including an attitude-director indicator, horizontal situation indicator, pressure altimeter, radio altimeter, vertical speed indicator, radio magnetic indicator, Mach airspeed indicator, autopilot-flight director mode annunciator, load factor indicator and true air-speed indicator.