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    GMT, Time, and Roost
    Using Eagle Transmitter Data to Determine Roost Locations

    Night roosts are some of the most critical habitats to wintering bald eagles, especially in severe winter weather, so we like to isolate those for mapping purposes to look for patterns of regular/annual use, so we can pursue protection of those sites if needed.

The colored column contains data as it looks when it comes from ARGOS. Practice converting GMT to EDT. You figure out if it falls between 18:00 and 6:00 EDT.

ARGOS Transmitter Time
Greenwich Mean Time (GMT)

Eagle Time
(Military Time subtract 4 hrs)

Eastern Daylight Time
(EDT)

Eagle Time
(Civillian Time)

Eastern Daylight Time
(EDT)
Critical Roosting Time?
(Between 18:00 and 6:00 EDT)
"R"
21:46
17:46
5:46 PM
No
6:21
2:21
2:21 AM
R
21:44
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7:16
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22:16
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2:55
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16:05
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Now find satellite time from sightings on today's map and convert to GMT.
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ARGOS Transmitter Time
.Military Time
Civillian Time.
.Critical Roosting Time?
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