### phaseExists

Accepts an event-station pair if the given phase exists at the station.

### Example

    <phaseExists>
      <phaseName>ttp</phaseName>
    </phaseExists>

### This consists of

<phaseExists>

<modelName> optional
model choice
1066a
1066b
ak135
alfs
herrin
iasp91
jb
prem
pwdk
qdt
sp6
</modelName>
<phaseName>phaseName</phaseName>
</phaseExists>

### Places this can be found

In eventStation there is a choice between all of the following

- distanceRange
- printlineEventStation
- azimuthRange
- backAzimuthRange
- linearDistanceMagnitudeRange
- eventStationAND
- eventStationOR
- eventStationNOT
- midPoint
- removeStationDuplicate
- phaseExists
- phaseWithoutInterference
- eventStationScript
- externalEventStationSubsetter