I am trying to call the Enroute webservice to return the list of enroute flights for London Heathrow (EGLL).
When I make the call to the enroute service, the webservice returns a list of enroute flights. In other words, I believe I am calling the webservice correctly. I have tried using the HowMany and Offset fields to vary the list length and position in the enroute list. I do not have any Filters applied.
In all cases the list of flights returned appears to be incomplete. Usually only 10 or so flights are returned which are currently in the air and enroute to Heathrow. All other flights later in the list are yet to depart. In reality Heathrow has many more inbound flights than 10.
In addition the data at uk.flightaware.com/live/airport/EGLL shows the exact same list of enroute flights as per the webservice call (bottom left corner of the webpage). However the map at the top of the webpage contains other flights bound for Heathrow that are not included in the enroute list.
Can anybody explain this? Are some enroute flights for Heathrow really missing? Is this a known limitation? Or am I doing something wrong?
Any help much appreciated.