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От он родимый.... Немного отличается от замеченного ранее : )

Типичное заблуждение. Возможность использования ГЛОНАСС не определяется количеством КА в системе.
Например. Для пространственных определений необходимо четыре навигационных КА. При этом три пространственных координаты трансформируются в широту, долготу и высоту. Высоту над реальной поверхностью получить весьма сложно, поэтому получают высоту над общим Земным эллипсоидом. В Москве это примерно 170-190 м. Возникает вопрос: кому она нужна? Ответ: примерно 1% потребителей, причем реальная (над квазигеоидом). Для "плоской" навигации нужно три спутника, а это обеспечивается уже 12-тью КА в системе.
Уверен, что слабое использование ГЛОНАСС, это лишь отсутствие достойных портативных приемников.
А состав группировки ГЛОНАСС лишь повод Министерствам ничего не делать и не внедрять. Гораздо проще купить серийный массовый прибор.
Второе заблуждение точность. В GPS - 1м. Смешно. Для измерений на ПСП дальномерного кода решающий вклад в погрешность навигационных определений привносит эффект многолучевости, который в условиях естественных затенений может достигать 30 м. В среднем, даже на специализированные геодезические антенны, составляет около 2,5 м, что приводит к погрешностям определений не менее 4-5 м (это при нулевой ошибке эфемерид и ЧВП). Второй фактор - ионосфера, которая достигает 70 м в максимум солнечной активности. Кто нибудь видел двухчаастотный Garmin? Если бы такой был, он бы стоил не 10 т.р., а 150. В смысле точности орбитального сегмента GPS имеет преимущество, но не на порядок, а 1,5-2 раза. Учитывая описанные факторы, а также погрешность карт (метров 30 для Московской губернии, и метров 100-150 за её пределами) это преимущество окончательно сводиться на нет.

piligrim писал(а):На 04.12.2007г.
Используются по целевому назначению 13 КА

и ведь почти уже довели:

на 02.09.2010г.
Всего в составе ОГ ГЛОНАСС 26 КА
Используются по целевому назначению 21 КА
На этапе ввода в систему 3 КА
...
После доведения числа спутников до 24 будет обеспечено уверенное покрытие всей поверхности Земли.

csman писал(а):

piligrim писал(а):На 04.12.2007г.
Используются по целевому назначению 13 КА

и ведь почти уже довели:

на 02.09.2010г.
Используются по целевому назначению 21 КА

Еще полгода спустя:

На сегодняшний день на орбите работают 23 спутника ГЛОНАСС

Шведская компания Swepos заявила, что в северных широтах российская навигационная система ГЛОНАСС работает лучше, чем американская GPS.

До конца года Путин потребовал довести численность космических аппаратов в группировке до 29-30.

csman писал(а):От он родимый.... Немного отличается от замеченного ранее : )

Ну вот, вуаля, в айфон загнали. Немного отличается от армейского кирпича : )

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