Post the balloon flight on flight progress strips along the planned trajectory and revise routing as tracking/position reports require.
Radar flight follow balloons to the extent that equipment capabilities permit. If radar flight following is not possible, tracking should be attempted by communication with the “chase plane,” telephone contact with the operator, pilot, or ground observation reports.
Provide traffic advisories to all affected aircraft during initial contact specifying the balloon's known or estimated position, direction of movement, and altitude as “unknown” or “reported,” as appropriate.
Unless ATC requires otherwise, operators of unmanned free balloons are required to monitor the course of the balloon and record its position at least every two hours. As required in 14 CFR Section 101.39a, balloon position reports are not forwarded by the operator unless requested by ATC.
UNMANNED FREE BALLOON OVER (name of location),
or
ESTIMATED OVER (name of location), MOVING
(direction of movement).
LAST REPORTED ALTITUDE AT (altitude as reported by the operator or determined from pilot report),
or
ALTITUDE UNKNOWN.
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If this was followed, and someone could say "there's a balloon near this location which is similar to the last reported location of Northern Illinois Bottlecap Balloon Brigade balloon 12345" this probably wouldn't have happened.
As it is, they're getting into the airspace used by airliners at a time when peoples' hackles are raised with unknown balloons.
As it is, this still falls under the Chicago Convention.
> 2.2 An unmanned free balloon, other than a light balloon used exclusively for meteorological purposes and operated in the manner prescribed by the appropriate authority, shall not be operated across the territory of another State without appropriate authorization from the other State concerned.
> 2.3 The authorization referred to in 2.2 shall be obtained prior to the launching of the balloon if there is reasonable expectation, when planning the operation, that the balloon may drift into airspace over the territory of another State. Such authorization may be obtained for a series of balloon flights or for a particular type of recurring flight, e.g. atmospheric research balloon flights.
This is not exclusively a meteorological balloon. It is not getting authorization from the airspace it drifts into. That is not being done prior to a launch and as it travels.
