define the first version of the protocol buffers

Aircraft.proto

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+syntax = "proto3";
+package vatger.aman;
+
+message Aircraft {
+    enum EngineType {
+        UNKNOWN   = 0;
+        ELECTRIC  = 1;
+        TURBOPROB = 2;
+        JET       = 3;
+    }
+
+    string     callsign    = 1; // aircraft's callsign
+    string     airline     = 2; // corresponding airline
+    string     type        = 3; // aircraft ICAO type
+    string     wtc         = 4; // WTC
+    string     wakeRecat   = 5; // wake recatogization category
+    Int32      engineCount = 6; // number of engines
+    EngineType engineType  = 7; // engine type
+}

AircraftReport.proto

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+syntax = "proto3";
+package vatger.aman;
+
+import "Aircraft.proto";
+import "BaseTypes.proto";
+
+message AircraftReport {
+    Aircraft   aircraft           = 1; // aircraft information
+    string     initialApproachFix = 2; // last waypoint of the route
+    Coordinate position           = 3; // current WGS84 position
+    Dynamics   dynamics           = 4; // current aircraft dynamics
+    Time       timeAtIAF          = 5; // UTC time when aircraft is at IAF
+}

AircraftSchedule.proto

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+syntax = "proto3";
+package vatger.aman;
+
+import "Aircraft.proto";
+import "BaseTypes.proto";
+
+message AircraftSchedule {
+    Aircraft aircraft       = 1; // aircraft information
+    string   arrivalRoute   = 2; // planned arrival route
+    string   arrivalRunway  = 3; // planned arrival runway
+    Time     reachIafAtTime = 4; // UTC time when the aircraft needs to pass IAF
+}

BaseTypes.proto

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+syntax = "proto3";
+package vatger.aman;
+
+message Coordinate {
+    string latitude  = 1; // WGS84 latitude in degrees
+    string longitude = 2; // WGS84 longitude in degrees
+}
+
+message Dynamics {
+    int32 groundSpeed   = 1; // given in knots
+    int32 altitude      = 2; // given in feet
+    int32 verticalSpeed = 3; // given in feet/min
+}
+
+message Time {
+    int32 hour   = 1; // hours in 24-format
+    int32 minute = 2; // minutes
+}