Subject: Administrative, Planned Leap Second Activities and Special
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Topic: Planned Leap Second Activities and Special GOES Spacecraft
Operations Are Scheduled on June 30, 2012

Date/Time Issued: June 28, 2012, 1720 UTC

Product(s) or Data Impacted: GOES-13 (GOES-East) Imaging and Sounding
Navigation

Date/Time of Initial Impact: June 30, 2012 at 2345 UTC

Date/Time of Expected End: July 1, 2012 at 0046 UTC

Length of Impact:  See table in details.

Details/Specifics of Impact: A leap second is a one-second adjustment
that
is occasionally applied to Coordinated Universal Time (UTC) in order to
keep its time of day close to the mean solar time. UTC and all
time scales
based on UTC will be affected by this adjustment.

At the end of day on June 30, 2012 (DOY 182/183 transition) a
positive leap
second will be introduced into the UTC time system. Special operations
are
required for the GOES N-P spacecraft surrounding the extra second.

A small (less than a 5km shift) imaging and sounding navigation
error is
expected only on GOES-13 (GOES-East). There is no expected error
on GOES-15
(GOES-West).

GOES-13 (GOES-East)
23:59:60 UTC - leap second applied
23:45 UTC - Full Disk image (small data shift in the second half of the
image)
23:46 UTC - CONUS Sounding (small data shift in the second half of the
sounding)
00:15 UTC - Northern Hemisphere image (image returned to normal)
00:46 UTC - CONUS Sounding (sounding returned to normal)

GOES-15 (GOES-West)
23:59:60 UTC - leap second applied
00:00 UTC - Full Disk Image (no error expected)
00:02 UTC - CONUS Sounding (no error expected)

There is no special operation required for GOES-12 (GOES-South
America),
therefore there is no expected error on its imaging and sounding.

Please note: This is no backup date.

Contacts for Further Information:  ESPC Operations Help Desk at
ESPCOperations@noaa.gov or (301) 817-3880

Additional Web Site Resources:
See http://www.ssd.noaa.gov/PS/SATS/messages.html for this and other
satellite related messages.
See http://www.ospo.noaa.gov/Operations/GOES/schedules.html for GOES
schedules.

This message was sent to ESPC.Notification@noaa.gov. You have been sent
this and other notifications because you have opted in to receive
it. If
for any reason, you wish to unsubscribe, please contact ESPC Help
Desk at
ESPCOperations@noaa.gov or (301) 817-3880. Please note: it may take
up to
two business days to process your unsubscribe request.

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Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

<div>Topic: Planned Leap Second Activities and Special GOES Spacecraft
Oper=
ations Are Scheduled on June 30,
2012</div><div><br></div><div>Date/Time Is=
sued: June 28, 2012, 1720 UTC</div><div><br></div><div>Product(s)
or Data I=
mpacted: GOES-13 (GOES-East) Imaging and Sounding Navigation</div>

<div><br></div><div>Date/Time of Initial Impact: June 30, 2012 at
2345 UTC<=
/div><div><br></div><div>Date/Time of Expected End: July 1, 2012 at
0046 UT=
C</div><div><br></div><div>Length of Impact: =A0See table in
details.</div>

<div><br></div><div>Details/Specifics of Impact: A leap second is
a one-sec=
ond adjustment that is occasionally applied to Coordinated Universal
Time (=
UTC) in order to keep its time of day close to the mean solar
time. UTC and=
 all time scales based on UTC will be affected by this
 adjustment.</div>

<div><br></div><div>At the end of day on June 30, 2012 (DOY 182/183
transit=
ion) a positive leap second will be introduced into the UTC time
system. Sp=
ecial operations are required for the GOES N-P spacecraft surrounding
the e=
xtra second.=A0</div>

<div><br></div><div>A small (less than a 5km shift) imaging and
sounding na=
vigation error is expected only on GOES-13 (GOES-East).=A0There is
no expec=
ted error on GOES-15 (GOES-West).</div><div><br></div><div>GOES-13
(GOES-Ea=
st)</div>

<div>23:59:60 UTC - leap second applied</div><div>23:45 UTC - Full
Disk ima=
ge (small data shift in the second half of the image)</div><div>23:46
UTC -=
 CONUS Sounding (small data shift in the second half of the
 sounding)</div>

<div>00:15 UTC - Northern Hemisphere image (image returned to
normal)</div>=
<div>00:46 UTC - CONUS Sounding (sounding returned to
normal)</div><div><br=
></div><div>GOES-15 (GOES-West)</div><div>23:59:60 UTC - leap second
applie=
d</div>

<div>00:00 UTC - Full Disk Image (no error expected)</div><div>00:02
UTC - =
CONUS Sounding (no error expected)</div><div><br></div><div>There is
no spe=
cial operation required for GOES-12 (GOES-South America), therefore
there i=
s no expected error on its imaging and sounding.</div>

<div><br></div><div>Please note: This is no backup
date.</div><div><br></di=
v><div>Contacts for Further Information: =A0ESPC Operations Help Desk
at <a=
 href=3D"mailto:ESPCOperations@noaa.gov">ESPCOperations@noaa.gov</a>
 or (30=
1) 817-3880</div>

<div><br></div><div>Additional Web Site Resources:</div><div>See
<a href=3D=
"http://www.ssd.noaa.gov/PS/SATS/messages.html">http://www.ssd.noaa.gov/PS/=
SATS/messages.html</a> for this and other satellite related
messages.</div>

<div>See <a
href=3D"http://www.ospo.noaa.gov/Operations/GOES/schedules.html=
">http://www.ospo.noaa.gov/Operations/GOES/schedules.html</a> for
GOES sche=
dules.</div><div><br></div><div>This message was sent to <a
href=3D"mailto:=
ESPC.Notification@noaa.gov">ESPC.Notification@noaa.gov</a>. You have
been s=
ent this and other notifications because you have opted in to receive
it. I=
f for any reason, you wish to unsubscribe, please contact ESPC Help
Desk at=
 <a href=3D"mailto:ESPCOperations@noaa.gov">ESPCOperations@noaa.gov</a>
 or =
(301) 817-3880. Please note: it may take up to two business days
to process=
 your unsubscribe request.</div>



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