Question on FAA's ASDI data from Seattle Center


OK, only tangentially FlightXML related I admit, but whoever feeds these APIs will know as it’s one of the sources you use.

I’m curious if the ASDI (Aircraft Situation Display to Industry) data fed by Seattle Center includes the optional secOfMinuteOfDegreeType data? Only degrees and minutes are required, seconds are optional. See … ements.xsd

If so, how long has Seattle Center included ‘seconds’ resolution? Since 2012?

Finally, is the frequency of TZ records realty only every 4 minutes, even close to KSEA?




I don’t have any exposure to that information, since the data is already abstracted and processed in several layers upstream from us.