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The Amateur Radio on the International Space Station, ARISS, program
is planning a slow scan television, SSTV, event starting on
Thursday, July 20, and continuing for 2 days, to commemorate its
20th anniversary. Transmissions, set to get under way around 2125
UTC, will feature 12 images from past and present ARISS activities.
The SSTV signal should be available nearly anywhere on the globe at
some point during the event.  Starting with our first meeting in
November 1996, our joint operations on Mir, becoming the first
operational payload on ISS in November 2000, to our more than 1,100
school contact so far, ARISSs accomplishments have been tremendous,
ARISS International Chair Frank Bauer, KA3HDO, said, in first
announcing the SSTV event last.  We have touched the lives of many
and inspired and educated countless students to pursue science,
technology, engineering, and math careers.  The event plans to use a
computer on the ISS Russian Segment, which stores images that are
then transmitted to Earth using the onboard Kenwood TM D710
transceiver, the ARISS announcement explained. Those receiving the
images can post them for public viewing.  SSTV signals will be
transmitted on 145.80 MHz using FM. The SSTV mode is expected to be
PD120, with PD180 as a possible second option. Free SSTV decoder
software is available on the Internet.  ARISS asked educators to
consider ways in which they might use this opportunity to inspire
their students by having them take advantage of this chance to
capture images directly from space to their computers.  All ARISS
events are dependent on other activities, schedules, and crew
responsibilities on the ISS and are subject to change at any time.
News and updates are on the ARISS website at, //www.ariss.org/, the
AMSAT website at, //www.amsat.org/, the AMSAT BB, the ARISS Facebook
page, and the ARISS Twitter feed.  At 0057 UTC on July 7 the
Australian Space Forecast Centre issued a Geomagnetic Disturbance
Warning, Expect an increase in geomagnetic activity late on UT day,
08 to 09 July due to influence of geoeffective coronal hole.  Our
sun showed no sunspots on July 3 and 4, so average daily sunspot
numbers dropped from 20.3 on June 22 to 28 to 8 during the current
reporting week, June 29 through July 5.  Average daily solar flux
went from 73.6 to 71.7.  An archive of past propagation bulletins is
at //arrl.org/w1aw dash bulletins dash archive dash propagation.
More good information and tutorials on propagation are at
//k9la.us/.  Monthly propagation charts between four USA regions and
twelve overseas locations are at //arrl.org/propagation.  Sunspot
numbers were 12, 11, 11, 11, 0, 0, and 11, with a mean of 8. 10.7 cm
flux was 71.8, 71.5, 70.7, 71.2, 71.7, 71.8, and 73, with a mean of
71.7.  Estimated planetary A indices were 5, 4, 11, 18, 5, 4, and 3,
with a mean of 7.1. Estimated mid latitude A indices were 6, 4, 14,
20, 7, 5, and 2, with a mean of 8.3.


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