What type of altitude input is required for TAWS?
Most TAWS installations require only uncorrected barometric pressure altitude information from an existing encoding altimeter. This altitude information is combined together with the altitude dervied from the connected GPS to provide accurate altitude information. This combination of pressure altitude and GPS altitude is called “Geometric Altitude” which is less susceptible to errors or malfunctions from normal altimeter systems. Another benefit of the Geometric Altitude is that the pilot now has an independent monitor of altitude. The system will provide a voice alert and display to the pilot should an abnormal difference between the two altitude sources occur. Note: As mentioned, most TAWS systems only require uncorrected barometric pressure altitude information. This information is found in all modern encoders and encoding altimeters that are used for Mode C ATC operations. However, the L3/Goodrich Landmark TAWS8000 requires corrected barometric pressure altitude information from a
Most TAWS installations require only uncorrected barometric pressure altitude information from an existing encoding altimeter. This altitude information is combined together with the altitude dervied from the connected GPS to provide accurate altitude information. This combination of pressure altitude and GPS altitude is called &Geometric Altitude& which is less susceptible to errors or malfunctions from normal altimeter systems. Another benefit of the Geometric Altitude is that the pilot now has an independent monitor of altitude. The system will provide a voice alert and display to the pilot should an abnormal difference between the two altitude sources occur. Note: As mentioned, most TAWS systems only require uncorrected barometric pressure altitude information. This information is found in all modern encoders and encoding altimeters that are used for Mode C ATC operations. However, the L3/Goodrich Landmark TAWS8000 requires corrected barometric pressure altitude information from a
