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From: oler@rho.uleth.ca (Cary Oler)
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Subject: Daily Summary of Ionospheric Data for 17 December
To: solar-daily@lut.fi
Date: Sat, 18 Dec 93 6:49:21 MST
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                    ---------------------------------------
                    DAILY IONOSPHERIC SUMMARY FOR 17 DEC 93
                    ---------------------------------------


M-FACTORS FOR 3000 KM DISTANCES - M(3000)F2
-------------------------------------------

     MUR  ASH  SAL  DIX  MAG  SVE  TOM  JUL  UPS  WLP  MAU  VBG  GOO  EIE  TAO  KEA  ARG  BER  DYS  LEA
     ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---
00Z:      3.2            3.5            2.9       3.1  3.0  3.4  3.0   B   3.6  3.1   B    B   3.4
01Z:      3.4                 3.0  2.8  2.8  2.8       3.3  3.4  2.7   B   3.6  3.4   B    B   3.5  2.7
02Z:      3.2  3.0       3.5  2.9  3.0  3.1            3.5  3.2  2.8   B   3.8  3.5   B    B   3.7  2.5
03Z:      3.2  3.1       3.5       3.3  3.1  3.2       3.5   B   2.9  3.0  2.9  3.6   B    B   2.9  2.7
04Z:      3.2  3.1       3.4  3.2  3.6       3.1       3.5  3.0  2.8   A   3.3  3.5   B    B   3.0  2.8
05Z:      3.2  3.1       3.5  3.4  3.5  3.5            3.5  3.0   A   3.5  3.6  3.5   B    B   3.1  2.7
06Z:      3.1  3.3       3.5  3.2  3.6  3.6            3.2   A   2.4  3.6   R   3.2   B   3.4  2.8  2.6
07Z: 3.1  3.1  3.4  3.1  3.8  3.5  3.6  3.2            3.0  3.1  2.6  3.4  3.0  3.0  3.3  3.5  3.2  3.1
08Z: 3.3       3.3            3.4  3.5  3.3            3.3  3.7   A   3.4  3.4  3.4   B    B   3.2   A
09Z:           3.4       3.2  3.4  3.6                 3.4  2.9   B    A   3.4  3.4  3.0   B   3.7  3.1
10Z:           3.3       3.0  3.3  3.7                 2.7  3.0   A    A   3.6  2.7  3.0   B    B   3.2
11Z: 3.3  3.1  3.2            2.8  3.5                 3.0  3.2  2.8   B   3.3  3.0  3.4  3.5   B    A
12Z: 3.1  3.2  3.1                 3.2                 3.2  2.8  3.2   B   3.3  3.2  3.4  3.3  3.1  3.7
13Z:      3.3                      2.8                 3.0  2.7   B    B   3.4  3.0  3.3  3.6  3.3  3.0
14Z: 3.1  2.9  3.3       3.0       2.7                 3.3  3.1  3.3   A   3.8  3.3  3.3  3.4  3.5   B
15Z: 3.1       3.2  3.0  3.0       2.8                 3.3  3.6  3.2   B   3.0  3.3  3.3  3.8  3.5  3.5
16Z: 3.1       3.2       3.0       3.1                 2.8  3.6  3.3   A   3.2  2.8  3.3  3.5  3.8  3.6
17Z: 3.1  3.3            2.8       2.9                 3.3  3.6  3.4   B   3.2  3.3  3.5            3.5
18Z:           3.3       2.8  3.0                           3.5  3.5   A   3.2       3.7  3.6       2.8
19Z:                                                        3.4  3.3   B   3.5       3.4  3.5        A
20Z:                                                        3.3  2.5   B   3.4       3.0  3.6       2.6
21Z:                                                        3.4  2.7   B    I         B   3.8  3.5  3.3
22Z:                                                        3.2  2.9   B   2.8        B   3.6  3.3  3.2
23Z:                                                        3.4  2.9   B   3.5        B    A   3.5  2.6
=========================================
Estimated Average Global M(3000)F2:  3.22.


MINIMUM OBSERVED FREQUENCIES - FMIN (MHz)
-----------------------------------------

     MUR  ASH  SAL  DIX  MAG  SVE  TOM
     ---  ---  ---  ---  ---  ---  ---
00Z:      2.0       2.1  1.4
01Z:      2.0                 1.0  2.2
02Z:      2.0  1.0       1.5  1.6  1.2
03Z:      2.0  1.0  2.0  1.5       1.0
04Z:      2.0  1.5       1.3  1.9  1.4
05Z:      2.0  1.7       1.0  1.7  1.4
06Z:      2.0  1.6       1.0  1.8  1.2
07Z: 1.1  2.0  1.6  1.5  1.0  1.0  1.8
08Z: 1.6       1.0            1.7  1.7
09Z:           1.6       1.0  1.8  2.0
10Z:           1.5  1.1  1.0  1.4  1.4
11Z: 1.5  2.0  1.0            1.8  1.0
12Z: 1.4  2.0  1.0  1.0  1.0       1.0
13Z:      2.0  1.5  3.0            1.2
14Z: 1.0  2.0  1.0  1.4  1.0       1.3
15Z: 1.4       1.0  1.5  1.0       1.2
16Z: 1.0       1.0       1.0       1.2
17Z: 1.0  2.0  1.0       1.0       1.3
18Z: 1.0  2.0  1.0       1.0  1.6
19Z:
20Z:
21Z:
22Z:
23Z:


CRITICAL SPORADIC E-LAYER FREQUENCIES - Es (MHz)
------------------------------------------------

     MUR  ASH  SAL  DIX  MAG  SVE  TOM
     ---  ---  ---  ---  ---  ---  ---
00Z:                4.2
01Z:
02Z:
03Z:                4.0            1.5
04Z:                               2.0
05Z:                     2.0       2.0
06Z:                     2.2       1.8
07Z: 2.0                 1.5       2.0
08Z:                               1.9
09Z:                     2.1  2.5
10Z:                2.7       2.8
11Z:      3.4                 2.3
12Z:      2.9  2.0  2.6            3.0
13Z:                4.3
14Z: 2.0            5.2
15Z:                5.0
16Z: 2.5       1.3
17Z: 2.8  2.4  2.5
18Z: 3.5  2.4  5.2
19Z:
20Z:
21Z:
22Z:
23Z:


OBSERVED CRITICAL F2 LAYER FREQUENCIES (MHz)
--------------------------------------------

      MUR  ASH  SAL  DIX  MAG  SVE  TOM  JUL  UPS  POI  WAR  OTI  WLP  MAU  VBG  GOO  EIE  TAO  CHU  KEA  ARG  BER  DYS  LEA
     ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
00Z:       4.7            4.3            3.1  2.8  3.6  2.7       3.8 12.1  7.8  2.9   B   7.8      12.1   B    B   5.2
01Z:       4.4                 2.0  2.6  2.9  2.2  3.5  3.1           12.5  4.8  2.9   B   8.0      12.5   B    B   4.1  5.8
02Z:       3.7  3.0       5.9  2.1  2.2  2.6       3.8  2.8           10.6  5.3  3.2   B   6.4      10.6   B    B   3.3  5.6
03Z:       3.7  2.2       6.1       3.9  2.2  2.3  4.4  3.0            6.8   B   2.7  3.2  8.5       6.8   B    B   2.7  6.3
04Z:       5.4  2.0       5.4  2.9  5.0   A   2.1  4.2   A             5.5  2.6  2.6   A  14.2       5.5   B    B   3.5  7.1
05Z:       5.4  2.8       5.3  4.9  5.9  2.0       3.0   C             4.0  3.0   A   3.8 14.4       4.0   B    B   3.6  7.5
06Z:       7.9  3.7       5.3  6.0  6.6  2.1       2.6   C             2.9   A   2.6  3.7   R        2.9   B   4.9  4.1  7.8
07Z:  2.7  7.0  4.3  3.0  3.3  6.0  6.7  3.3       3.0  4.8            2.9  3.7  2.7  3.5 13.8       2.9  2.3  4.7  4.2  8.3
08Z:  3.2       4.5            6.3  6.3  5.1            5.8            3.2  2.8   A   4.3 10.8       3.2   B    B   3.9   A
09Z:            4.8       1.6  6.9  5.9                                2.2  2.6   B    A   8.3       2.2  2.4   B   4.1  6.2
10Z:            4.3       1.5  7.0  5.4                                1.9  2.9   A    A   5.4       1.9  2.3   B    B   5.6
11Z:  4.5  6.8  3.0            5.3  3.3                                2.8  2.4  2.5   B   6.0       2.8  4.0  4.4   B    A
12Z:  2.3  5.8  1.3                 2.4                                3.2  2.6  4.0   B   5.4       3.2  5.3  7.2  2.9  3.0
13Z:       5.2                      1.9                                3.5  2.9   B    B   4.6       3.5  6.7  7.6  4.0  4.5
14Z:  2.2  4.5  1.8       3.6       1.8                                3.5  3.4  5.1   A   2.6   B   3.5  6.8  8.8  6.3   B
15Z:  2.3       2.8  3.0  3.6       2.0                                2.6  5.6  5.6   B   3.0   B   2.6  6.7  8.1  7.1  4.1
16Z:  2.3       2.4       3.5       2.2                      8.0       2.3  6.9  6.3   A   2.9   B   2.3  7.1  8.3  6.6  4.6
17Z:  3.0  2.6            3.1       2.3                                3.9  6.1  6.7   B   2.8   B   3.9  7.0            4.1
18Z:  3.2       2.9       2.9  2.0                                          6.9  7.2   A   2.4   B        7.0  7.4       3.0
19Z:                                                                        8.0  5.8   B   3.5   R        5.7  7.1        A
20Z:                                                                        7.6  3.3   B   3.4  6.7       4.1  6.8       2.8
21Z:                                                                        7.2  3.7   B    I    F         B   5.3  7.2  3.0
22Z:                                                                        6.7  3.4   B   2.0   I         B   4.0  6.8  4.6
23Z:                                                                        7.2  2.8   B   5.3             B    A   6.2  5.8
=========================================
Estimated Average Global foF2:  4.60 MHz.


MAXIMUM USABLE FREQUENCIES FOR 3000 KM PATHS (MHz) - MUF(3000)
--------------------------------------------------------------

      MUR  ASH  SAL  DIX  MAG  SVE  TOM  JUL  UPS  WLP  MAU  VBG  GOO  EIE  TAO  KEA  ARG  BER  DYS  LEA
     ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
00Z:      15.0           15.1            9.0      11.8 36.9 26.5  8.7   B  28.1 37.5   B    B  17.7
01Z:      15.0                 6.0  7.3  8.1  6.3      41.9 16.3  7.8   B  28.8 42.5   B    B  14.3 15.7
02Z:      11.8  9.0      20.6  6.1  6.6  8.1           37.1 17.0  9.0   B  24.3 37.1   B    B  12.2 14.0
03Z:      11.8  6.8      21.4      12.9  6.8  7.5      24.1   B   7.8  9.6 24.7 24.5   B    B   7.8 17.0
04Z:      17.3  6.2      18.4  9.3 18.0   A   6.5      19.0  7.8  7.3   A  46.9 19.2   B    B  10.5 19.9
05Z:      17.3  8.7      18.6 16.7 20.6  7.0           14.0  9.0   A  13.3 51.8 14.0   B    B  11.2 20.2
06Z:      24.5 12.2      18.6 19.2 23.8  7.6            9.3   A   6.2 13.3   R   9.3   B  16.7 11.5 20.3
07Z:  8.4 21.7 14.6  9.3 12.5 21.0 24.1 10.6            8.7 11.5  7.0 11.9 41.4  8.7  7.6 16.4 13.4 25.7
08Z: 10.6      14.8           21.4 22.1 16.8           10.7 10.4   A  14.6 36.7 10.9   B    B  12.5   A
09Z:           16.3       5.1 23.5 21.2                 7.5  7.5   B    A  28.2  7.5  7.2   B  15.2 19.2
10Z:           14.2       4.5 23.1 20.0                 5.1  8.7   A    A  19.4  5.1  6.9   B    B  17.9
11Z: 14.8 21.1  9.6           14.8 11.6                 8.3  7.7  7.0   B  19.8  8.4 13.6 15.4   B    A
12Z:  7.1 18.6  4.0                 7.7                10.1  7.3 12.8   B  17.8 10.2 18.0 23.8  9.0 11.1
13Z:      17.2                      5.3                10.5  7.8   B    B  15.6 10.5 22.1 27.4 13.2 13.5
14Z:  6.8 13.1  5.9      10.8       4.9                11.6 10.5 16.8   A   9.9 11.6 22.4 29.9 22.1   B
15Z:  7.1       9.0  9.0 10.8       5.6                 8.6 20.2 17.9   B   9.0  8.6 22.1 30.8 24.9 14.3
16Z:  7.1       7.7      10.5       6.8                 6.4 24.8 20.8   A   9.3  6.4 23.4 29.1 25.1 16.6
17Z:  9.3  8.6            8.7       6.7                12.9 22.0 22.8   B   9.0 12.9 24.5           14.3
18Z:            9.6       8.1  6.0                          24.1 25.2   A   7.7      25.9 26.6       8.4
19Z:                                                        27.2 19.1   B  12.2      19.4 24.9        A
20Z:                                                        25.1  8.2   B  11.6      12.3 24.5       7.3
21Z:                                                        24.5 10.0   B    I         B  20.1 25.2  9.9
22Z:                                                        21.4  9.9   B   5.6        B  14.4 22.4 14.7
23Z:                                                        24.5  8.1   B  18.6        B    A  21.7 15.1
===============================================
Estimated Average Global MUF(3000)F2: 14.84 MHz.


OBSERVED TOTAL IONOSPHERIC ELECTRON CONTENT
-------------------------------------------

      BOU  TAO  ANC  CNV  PAL  SHE  OSA
     ---- ---- ---- ---- ---- ---- ----
00Z:  140  260   99  130  500
01Z:  100  300   76  110  520
02Z:   61  490   51   86  350
03Z:       600   10   97  160
04Z:   47  620   33  100  120
05Z:   55  560   26  110   82
06Z:   57  500   27  100   48
07Z:   60  470   29  120   48
08Z:   54  430   25  130   42
09Z:   45  280   22  120   29
10Z:       200   25  100   24
11Z:   44  170   22  100   26
12Z:   43  150   19  110   33
13Z:   41        22  160   43
14Z:   49        26  190   43
15Z:   80        23  220   37
16Z:  110        21  210   38
17Z:  120  110   24  200   61
18Z:  150  100   38  220   86
19Z:  170   99   69  230  140
20Z:        81   97  220  200
21Z:  160   76  130  190  270
22Z:  180  100  200  190  300
23Z:  180  180  220  170  290


LIST OF REPORTING STATIONS AND THE SATELLITES THEY USE TO MEASURE TEC:

MUR = Murmansk                   USSR                (N68E033)
ASH = Ashkhabad                  USSR                (N37E058)
SAL = Salekhard                  USSR                (N66E066)
DIX = Dixon                      USSR                (N74E081)
MAG = Magadan                    USSR                (N60E151)
SVE = Sverdlovsk                 USSR                (N56E061)
TOM = Tomsk                      USSR                (N56E085)
JUL = Juliusruh/Rugen            Germany             (N54E013)
UPS = Uppsala                    Sweden              (N60E018)
POI = Poitiers                   France              (N46E000)
WAR = Warsaw                     Poland              (N52W021)
OTI = Ottawa                     Canada              (N45W076)
BOU = Boulder CO                 USA                 (N40W105)
WLP = Wallops Island VA          USA                 (N37W075)
MAU = Maui HI                    USA                 (N20W157)
VBG = Vandenberg AFB CA          USA                 (N34W120)
GOO = Goose Bay                  Canada              (N53W060)
EIE = Eielson AFB AK             USA                 (N64W147)
TAO = Taoyuan                    Taiwan              (N25E121)
CHU = Churchill                  Canada              (N58W094)
KEA = Keakawapu HI               USA                 (N20W156)
ARG = Argentia                   Canada              (N48W053)
BER = Bermuda                    Bermuda             (N32W064)
DYS = Dyess AFB TX               USA                 (N32W099)
LEA = Learmonth                  Australia           (S21E115)
ANC = Anchorage AK               USA                 (N61W150)
CNV = Cape Canaveral FL          USA                 (N28W080)
PAL = Palehua HI                 USA                 (N21W158)
SHE = Shemya AK                  USA                 (N52E174)
OSA = Osan AB                    Korea               (N37E127)


DESCRIPTIVE CODES WHICH MAY APPEAR IN THE FOF2, M(3000), OR SID SECTIONS:

            A = Blanketing Sporadic E
            B = Complete Absorption
            C = Equipment Problems
            D = Frequency Higher than Equipment
            E = Frequency Lower than Equipment
            F = Spread Echoes
            G = FOF2 is less than FOF1
            I = Smoothed Value
            R = Attenuation


     Values in this experimental daily report have not been checked
     for errors and may occasionally contain a few.  Total electron
     content values are given in units of 10^15 electrons per square meter.


