{"id":66565,"date":"2025-10-01T07:59:00","date_gmt":"2025-10-01T12:59:00","guid":{"rendered":"http:\/\/csinewsnow.com\/?p=66565"},"modified":"2025-10-17T08:16:25","modified_gmt":"2025-10-17T13:16:25","slug":"sun-interference-to-tvchannels-twice-a-year","status":"publish","type":"post","link":"https:\/\/csinewsnow.com\/?p=66565","title":{"rendered":"Sun Interference to TV channels Oct 6 thru Oct 15"},"content":{"rendered":"\n

Twice a year, the position of the sun in the sky causes interference to reception of TV channels such as ESPN, CNN, and others, that are delivered via satellite. \u00a0 It happens in the spring and in the fall. \u00a0The duration lasts from a few seconds to a few minutes during daytime hours\u00a0–\u00a0 noon\u00a0 to 4:00 pm, Oct 6\u00a0 thru Oct 15.\u00a0 \u00a0 <\/span><\/strong>The time in early afternoon depends on the satellite the program is transmitted from.\u00a0 \u00a0The channel will “block-up” or disappear entirely for a few moments and then return.\u00a0 \u00a0 The worst days are Oct 9 & 10, then it will taper off, being shorter duration each day.\u00a0\u00a0<\/span><\/strong>

<\/strong><\/p>\n\n\n\n

It is NOT a problem with your cable TV or dish service.   All reception of TV channels via satellite experience interference of some sort, the time of day depends on location in the US.    Be patient – to verify your TV service is working – tune to CSi 2 to view CSi Weather.<\/strong><\/p>\n\n\n\n

A more technical description is provided by Electronic<\/a> Notes<\/p>\n\n\n\n

How Does the Sun Cause Interference to my Satellite Reception?<\/strong><\/p>\n\n\n\n

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\"solarout\"<\/a><\/figure><\/center>\n\n\n\n

Geostationary satellites are stationed at approximately 22,300 miles (36,000 kilometers) from Earth and located directly over the equator. Given the equator is offset by 22.5 degrees, the sun aligns directly with satellites and receiving earth stations twice a year\u2014once in the spring and once in the autumn<\/strong>. This event is called a sun outage and is also known as sun fade or sun transit.<\/p>\n\n\n\n

<\/p>\n\n\n\n

The heat emitted by the sun is an intense source of noise radiated at all frequencies, including the frequency range communication satellites use. That noise is called thermal noise. When the sun\u2014and its thermal noise\u2014aligns perfectly with a satellite and the receive antenna on the ground (line-of-sight), the the noise floor, as seen by the receive earth station, is significant enough that it rises above the satellite\u2019s carrier signal and causes a temporary loss of reception.<\/p>\n\n\n\n

A sun outage occurs because the earth station cannot distinguish between the energy from the sun and its intended communication signal. This is similar to when one is listening to a person talk immediately adjacent to them and a loud noise suddenly drowns out the voice of the person speaking, such that all that can be heard is that loud noise, until the noise either stops or moves far enough away to again hear the speaking person\u2019s voice.<\/p>\n\n\n

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\"solarinterference\"<\/a><\/figure><\/div>\n\n\n

The sun\u2019s thermal noise overpowers the signal coming from the satellite. The duration of the solar interference depends on the receive antenna\u2019s location on the Earth, the satellite\u2019s orbital location above the equator, the size of the receive antenna and the reception frequency. These sun outages start with a signal loss of only a few minutes. The outages start small\u2014when the sun is very near alignment with the satellite and the earth station. The sun\u2019s thermal energy is strong enough to temporarily interfere with the satellite signal and cause an outage as it approaches direct alignment. Each day as the sun moves further north, the sun\u2019s alignment with the satellite and earth station move ever so slightly. As the sun becomes more aligned with the satellite and the earth station on the ground, the outage duration increases<\/p>\n\n\n\n

Peak outage time occurs when the sun, satellite and the earth station are exactly aligned with each other. The interference declines gradually as the sun starts moving away from the satellite and earth station alignment, until it is no longer a factor\u2014until the next interference season when the sun starts heading south (northern hemispheric in autumn).<\/p>\n\n\n\n

Given that all geostationary satellites are over the same geographic plane\u2014the equator\u2014and orbiting at the same distance, 22,300 miles or 36,000 kilometers, the sun outage will apply to every antenna at a given location. For instance, if there are four antennas looking at four different satellites (assuming the dishes are of the same size and same frequency reception), the solar outage will travel through all four satellites and antennas at that location in the same day. The four events will happen at different times of day for each satellite, as Earth\u2019s rotation creates alignment. The duration of the outage is inversely related to the size and frequency of the satellite receive dish. The larger the antenna, the shorter the duration and intensity of the outage. Similarly, the smaller the dish, the great the duration and intensity.<\/p>\n","protected":false},"excerpt":{"rendered":"

Twice a year, the position of the sun in the sky causes interference to reception of TV channels such as ESPN, CNN, and others, that are delivered via satellite. \u00a0 It happens in the spring and in the fall. \u00a0The duration lasts from a few seconds to a few minutes […]<\/p>\n","protected":false},"author":5,"featured_media":66579,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-66565","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-weathernews"],"_links":{"self":[{"href":"https:\/\/csinewsnow.com\/index.php?rest_route=\/wp\/v2\/posts\/66565","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/csinewsnow.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/csinewsnow.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/csinewsnow.com\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/csinewsnow.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=66565"}],"version-history":[{"count":53,"href":"https:\/\/csinewsnow.com\/index.php?rest_route=\/wp\/v2\/posts\/66565\/revisions"}],"predecessor-version":[{"id":296123,"href":"https:\/\/csinewsnow.com\/index.php?rest_route=\/wp\/v2\/posts\/66565\/revisions\/296123"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/csinewsnow.com\/index.php?rest_route=\/wp\/v2\/media\/66579"}],"wp:attachment":[{"href":"https:\/\/csinewsnow.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=66565"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/csinewsnow.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=66565"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/csinewsnow.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=66565"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}