Четвериков, Сергей Федорович. Информационно-измерительная система для изучения статистических свойств и суточно-сезонных вариаций интенсивности естественного ОНЧ радиошума [Электронный ресурс] = Using the information and measurement system to study statistical characteristics and daily and seasonal variation in the intensity of VLF atmospheric radio noise / С.Ф. Четвериков. — (Приборы, информационно-измерительные системы). — Электрон. текстовые дан. (1 файл : 352 Кб) // Научно-технические ведомости Санкт-Петербургского государственного политехнического университета. Сер.: Информатика. Телекоммуникации. Управление = St. Petersburg state polytechnical university journal. Computer science. Telecommunications and control systems: научное издание. – Санкт-Петербург. – 2014. – Загл. с титул. экрана. — Электронная версия печатной публикации. — Свободный доступ из сети Интернет (чтение, печать, копирование). — Текстовый файл. — Adobe Acrobat Reader 7.0. — <URL:http://elib.spbstu.ru/dl/2/4682.pdf>.
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Period
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Read
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Print
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Copy
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Open
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Total
|
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Year 2014
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Quarter 3
|
September
|
14
|
0
|
8
|
0
|
22
|
|
Quarter 4
|
October
|
3
|
0
|
2
|
0
|
5
|
|
November
|
5
|
0
|
1
|
0
|
6
|
|
December
|
7
|
0
|
3
|
0
|
10
|
|
Year 2015
|
Quarter 1
|
January
|
6
|
0
|
1
|
0
|
7
|
|
February
|
7
|
0
|
2
|
0
|
9
|
|
March
|
5
|
0
|
4
|
0
|
9
|
|
Quarter 2
|
April
|
4
|
0
|
2
|
0
|
6
|
|
May
|
4
|
0
|
2
|
0
|
6
|
|
June
|
4
|
0
|
0
|
0
|
4
|
|
Quarter 3
|
July
|
3
|
0
|
1
|
0
|
4
|
|
August
|
6
|
0
|
0
|
0
|
6
|
|
September
|
6
|
0
|
0
|
0
|
6
|
|
Quarter 4
|
October
|
6
|
0
|
4
|
0
|
10
|
|
November
|
1
|
0
|
0
|
0
|
1
|
|
December
|
9
|
0
|
10
|
0
|
19
|
|
Year 2016
|
Quarter 1
|
January
|
2
|
0
|
1
|
0
|
3
|
|
February
|
1
|
0
|
2
|
0
|
3
|
|
March
|
2
|
0
|
0
|
0
|
2
|
|
Quarter 2
|
April
|
0
|
0
|
4
|
0
|
4
|
|
May
|
0
|
0
|
0
|
0
|
0
|
|
June
|
5
|
0
|
1
|
0
|
6
|
|
Quarter 3
|
July
|
3
|
0
|
2
|
0
|
5
|
|
August
|
1
|
0
|
1
|
0
|
2
|
|
September
|
5
|
0
|
1
|
0
|
6
|
|
Quarter 4
|
October
|
10
|
0
|
6
|
0
|
16
|
|
November
|
2
|
0
|
4
|
0
|
6
|
|
December
|
3
|
0
|
4
|
0
|
7
|
|
Year 2017
|
Quarter 1
|
January
|
2
|
0
|
15
|
0
|
17
|
|
February
|
4
|
0
|
3
|
0
|
7
|
|
March
|
5
|
0
|
2
|
0
|
7
|
|
Quarter 2
|
April
|
0
|
0
|
1
|
0
|
1
|
|
May
|
3
|
0
|
3
|
0
|
6
|
|
June
|
2
|
0
|
3
|
0
|
5
|
|
Quarter 3
|
July
|
3
|
0
|
5
|
0
|
8
|
|
August
|
3
|
0
|
2
|
0
|
5
|
|
September
|
2
|
0
|
3
|
0
|
5
|
|
Quarter 4
|
October
|
1
|
0
|
3
|
0
|
4
|
|
November
|
2
|
0
|
4
|
0
|
6
|
|
December
|
4
|
0
|
3
|
0
|
7
|
|
Year 2018
|
Quarter 1
|
January
|
2
|
0
|
11
|
0
|
13
|
|
February
|
2
|
0
|
19
|
0
|
21
|
|
March
|
3
|
0
|
15
|
0
|
18
|
|
Quarter 2
|
April
|
3
|
0
|
13
|
0
|
16
|
|
May
|
3
|
0
|
3
|
0
|
6
|
|
June
|
2
|
0
|
7
|
0
|
9
|
|
Quarter 3
|
July
|
4
|
0
|
2
|
0
|
6
|
|
August
|
1
|
0
|
6
|
0
|
7
|
|
September
|
3
|
0
|
3
|
0
|
6
|
|
Quarter 4
|
October
|
4
|
0
|
4
|
0
|
8
|
|
November
|
3
|
0
|
3
|
0
|
6
|
|
December
|
1
|
0
|
1
|
0
|
2
|
|
Year 2019
|
Quarter 1
|
January
|
4
|
0
|
1
|
0
|
5
|
|
February
|
1
|
0
|
1
|
0
|
2
|
|
March
|
1
|
0
|
2
|
0
|
3
|
|
Quarter 2
|
April
|
1
|
0
|
3
|
0
|
4
|
|
May
|
4
|
0
|
1
|
0
|
5
|
|
June
|
0
|
0
|
3
|
0
|
3
|
|
Quarter 3
|
July
|
0
|
0
|
6
|
0
|
6
|
|
August
|
2
|
0
|
7
|
0
|
9
|
|
September
|
3
|
0
|
5
|
0
|
8
|
|
Quarter 4
|
October
|
2
|
0
|
5
|
0
|
7
|
|
November
|
0
|
0
|
2
|
0
|
2
|
|
December
|
2
|
0
|
4
|
0
|
6
|
|
Year 2020
|
Quarter 1
|
January
|
8
|
0
|
2
|
0
|
10
|
|
February
|
1
|
0
|
6
|
0
|
7
|
|
March
|
9
|
0
|
7
|
0
|
16
|
|
Quarter 2
|
April
|
7
|
0
|
0
|
0
|
7
|
|
May
|
4
|
0
|
0
|
0
|
4
|
|
June
|
2
|
0
|
0
|
0
|
2
|
|
Quarter 3
|
July
|
8
|
0
|
0
|
0
|
8
|
|
August
|
2
|
0
|
0
|
0
|
2
|
|
September
|
4
|
0
|
0
|
0
|
4
|
|
Quarter 4
|
October
|
2
|
0
|
0
|
0
|
2
|
|
November
|
4
|
0
|
11
|
0
|
15
|
|
December
|
3
|
0
|
2
|
0
|
5
|
|
Year 2021
|
Quarter 1
|
January
|
5
|
0
|
1
|
0
|
6
|
|
February
|
1
|
0
|
1
|
0
|
2
|
|
March
|
5
|
0
|
4
|
0
|
9
|
|
Quarter 2
|
April
|
1
|
0
|
2
|
0
|
3
|
|
May
|
2
|
0
|
4
|
0
|
6
|
|
June
|
5
|
0
|
5
|
0
|
10
|
|
Quarter 3
|
July
|
9
|
0
|
6
|
0
|
15
|
|
August
|
2
|
0
|
3
|
0
|
5
|
|
September
|
0
|
0
|
1
|
0
|
1
|
|
Quarter 4
|
October
|
2
|
0
|
2
|
0
|
4
|
|
November
|
2
|
0
|
0
|
0
|
2
|
|
December
|
0
|
0
|
1
|
0
|
1
|
|
Year 2022
|
Quarter 1
|
January
|
6
|
0
|
2
|
0
|
8
|
|
February
|
0
|
0
|
7
|
0
|
7
|
|
March
|
3
|
0
|
0
|
0
|
3
|
|
Quarter 2
|
April
|
2
|
0
|
3
|
0
|
5
|
|
May
|
5
|
0
|
1
|
0
|
6
|
|
June
|
1
|
0
|
7
|
0
|
8
|
|
Quarter 3
|
July
|
2
|
0
|
0
|
0
|
2
|
|
August
|
3
|
0
|
2
|
0
|
5
|
|
September
|
4
|
0
|
1
|
0
|
5
|
|
Quarter 4
|
October
|
2
|
0
|
2
|
0
|
4
|
|
November
|
3
|
0
|
1
|
0
|
4
|
|
December
|
4
|
0
|
0
|
0
|
4
|
|
Year 2023
|
Quarter 1
|
January
|
5
|
0
|
1
|
0
|
6
|
|
February
|
1
|
0
|
2
|
0
|
3
|
|
March
|
2
|
0
|
3
|
0
|
5
|
|
Quarter 2
|
April
|
2
|
0
|
1
|
0
|
3
|
|
May
|
2
|
0
|
2
|
0
|
4
|
|
June
|
2
|
0
|
1
|
0
|
3
|
|
Quarter 3
|
July
|
0
|
0
|
0
|
0
|
0
|
|
August
|
1
|
0
|
0
|
0
|
1
|
|
September
|
1
|
0
|
2
|
0
|
3
|
|
Quarter 4
|
October
|
2
|
0
|
3
|
0
|
5
|
|
November
|
2
|
0
|
5
|
0
|
7
|
|
December
|
1
|
0
|
0
|
0
|
1
|
|
Year 2024
|
Quarter 1
|
January
|
0
|
0
|
0
|
0
|
0
|
|
February
|
2
|
0
|
1
|
0
|
3
|
|
March
|
2
|
0
|
2
|
0
|
4
|
|
Quarter 2
|
April
|
3
|
0
|
6
|
0
|
9
|
|
Total
|
357
|
0
|
353
|
0
|
710
|
