{"id":23804,"date":"2022-04-05T13:09:05","date_gmt":"2022-04-05T12:09:05","guid":{"rendered":"https:\/\/reseau-orpheon.fr\/frequently-asked-questions\/"},"modified":"2022-08-08T11:09:10","modified_gmt":"2022-08-08T10:09:10","slug":"frequently-asked-questions","status":"publish","type":"page","link":"https:\/\/reseau-orpheon.fr\/en\/frequently-asked-questions\/","title":{"rendered":"Frequently Asked Questions"},"content":{"rendered":"\t\t
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Choose a theme<\/h3>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Click on the question to view the answer<\/h3>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tQuestions about Reception and Setup ?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t
Click here to view the questions relating to reception and configuration<\/a><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t
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Click here to view questions related to accuracy and local reference\u00a0<\/a><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t Influence of Ionospheric activity on GNSS?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Significant solar activity every 11 years<\/h2>\r\nSolar activity follows an eleven-year cycle, with 2015 being a maximum of this cycle. This year 2020 is therefore synonymous with the end of a cycle of reduced ionospheric disturbances for our applications. We must expect in the future to have to deal with increasing solar activity, hence the importance of having a dense network of permanent GNSS stations to properly model this error.\r\n\r\nAs you can see in the graph below, the cycle of solar activity is reaching its minimum and the forecast for this activity is now on the rise:\r\n
\"Le<\/a>
The cycle of solar activity from 2002 to todayDuring a day, ionospheric activity related to solar activity peaks around 12:00 p.m. solar time. Thus, as shown in the graph below, this ionospheric activity was very high on Wednesday October 2 at noon with I95 index values \u200b\u200bbeyond the limit of 8 indicating very high activity for the targeted applications and therefore impacting all communications satellites during their passage in the ionosphere then rich in charged particles:<\/figcaption><\/figure>\r\n
\"Activit\u00e9<\/a>
Ionospheric activity<\/figcaption><\/figure>\r\n

Disturbances related to geomagnetic storms<\/h2>\r\nAs you can see on the SpaceWeatherLive.com website, this phenomenon is global with an ionospheric index K (quantification of geomagnetic disturbances). This is an average of the K indices relating to 13 stations located between 44 and 60\u25e6 latitude; it is therefore an overall index.\r\n\r\n\"Activit\u00e9<\/a>\r\n\r\nThe K index is a local index which characterizes the variation of the magnetic field at the station considered compared to a calm reference day; these measurements are made using magnetometers. The Kp index scale includes\r\n10 rungs:\r\n\r\n\"null\"<\/a>\r\n

The levels of the Kp Index<\/p>\r\n\r\n

The impact on your connection<\/h2>\r\nAs you will have understood on this subject, if you have problems in the middle of the day (abnormally long time to fix the entire ambiguities or impossibility of fixing them in clear environments, repeated passages while floating even though you receive many corrections, etc. .), check the number and distribution of GPS satellites and check ionospheric activity via the site: http:\/\/gpsweather.meteo.be\/geomagnetism\/ground_K_dourbes<\/a>.<\/strong>\r\n\r\n\"null\"<\/a>\r\n

The strength of the Orpheon network<\/h2>\r\nOur network is currently built according to the rules of the art with stations every 60 km, you should not normally be too affected. However, we wanted to pass on the information to you, an informed user is worth two!<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t
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from Monday to Thursday\r\nfrom 9:00 a.m. to 1:00 p.m. and from 2:00 p.m. to 6:00 p.m.\r\nAnd on Friday\r\nfrom 9:00 a.m. to 1:00 p.m. and from 2:00 p.m. to 5:00 p.m.<\/div>\r\n

T\u00e9l :\u00a001 69 18 81 60<\/h3>\r\n

Fax : 01 69 18 81 61<\/h3>\r\n

Mail : contact@geodata-diffusion.fr<\/a><\/h3>\r\nOu acc\u00e9der au\u00a0Formulaire de contact<\/a>\r\n

Address :<\/h3>\r\nG\u00e9odata Diffusion\r\nImmeuble Le Viking \u2013 32, Avenue de la Baltique\r\n91140 Villebon-sur-Yvette \u2013 France\r\n

\u00a0Locate G\u00e9odata Diffusion<\/a><\/h3>\r\n(Click to open link)<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t
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Unlimited subscription<\/h3>\r\n<\/a>\r\n\r\nThese Subscriptions give the right to a single access to unlimited “real-time” correction services.\r\n\r\nThey also give access to 50 annual hours of RINEX files of physical stations from the ORPHEON network, as well as 2 annual hours of RINEX files of virtual stations generated from coordinates specified by THE SUBSCRIBER for deferred time applications: unused hours cannot be carried over to the following year.\r\n\r\nDifferent types of Subscriptions are offered for a greater choice, in particular the different coverage areas according to your real need National or Regional or Departmental or Local as well as different minimum commitment periods.\r\n

Duration :<\/h3>\r\nThe Subscription contract and its options are entered into for an initial period of at least 12 months depending on the length of commitment taken out by the SUBSCRIBER. Beyond the initial commitment period, the contract continues for an indefinite period.\r\n\r\nFor more information refer to the General Conditions of Sale\r\n\r\n
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Hourly Packages<\/h3>\r\n<\/a>\r\n\r\nOur non-binding formula for a single access to “real-time” or “Post-Processing and Downloading of RINEX” correction services for a limited period of time depending on the hourly volume of the option chosen, usable over 12 months from the subscription date for a National coverage area.\r\n\r\nAt the end of the 12 months, any unused hour is lost.\r\n\r\nDifferent durations of Hourly Packages are available.\r\n

The non-binding offer :<\/h3>\r\n