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From: oler@rho.uleth.ca (Cary Oler)
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Subject: Daily Summary of Ionospheric Data for 20 December
To: solar-daily@lut.fi
Date: Mon, 20 Dec 93 21:50:49 MST
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                    ---------------------------------------
                    DAILY IONOSPHERIC SUMMARY FOR 20 DEC 93
                    ---------------------------------------


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

     MUR  ASH  SAL  DIX  MAG  SVE  TOM  JUL  UPS  BOU  VBG  GOO  EIE  TAO  CHU  KEA  ARG  BER  NIC  DYS  LEA
     ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---
00Z:      3.1  2.9       3.6            2.7  2.8  3.5  3.4  2.5  3.2   C        3.2   A    A   3.2   A   3.0
01Z:      3.0            3.4            2.9            3.5  2.9  3.0  3.5       3.2   B    A   3.0   A   2.9
02Z:      3.1            3.5             C             2.3  2.4   B    C        3.6   B    A   3.3   A   2.9
03Z:      3.1                           2.9  2.8       3.4  3.2   B   3.2       3.6   B    A   3.3   A   2.7
04Z: 2.9  3.2  3.1                 3.5  3.1  2.8       3.4  2.8   B   3.2       3.7   B   3.2  3.0   A   2.8
05Z:           3.1       3.7  3.2       3.3  3.0       3.2  2.9  2.8  3.4       3.5   B    A   3.7   A   2.9
06Z:      .30  3.3       3.5  3.5       3.4            2.6  3.3  3.6  3.4       3.4  2.9   B        3.5  3.0
07Z:      3.0  3.3  3.3  3.7  3.5       3.4            2.8  2.7   A   3.3       2.9   B    B        3.0  3.0
08Z: 3.4       3.0       3.2            3.6            2.9   A    A   3.6       3.5   B    B         A   3.3
09Z: 3.4       3.4  3.2  3.2  3.7                      2.9   B   3.3  3.8        F    B    B        3.2  3.2
10Z: 3.4       3.5       2.8  3.5  3.6                 2.5   B    A   3.7       2.8   B    B        3.3  3.0
11Z: 3.2       3.5       2.8  3.4  3.4                 3.2  3.1   A   3.1       2.8  3.6  3.5       2.9  2.5
12Z: 3.3       3.3  2.9  3.0  3.3  3.1                 2.7  3.5  4.0  3.3       2.9  3.5  3.5       3.0  2.7
13Z: 3.2  2.8  3.3  2.9  3.0  3.0  3.0                 3.0  3.4  2.5  3.5       3.3  3.6            3.1   A
14Z: 3.3  2.8  3.0       3.0  3.0  3.1                 3.2  3.4  2.4  3.5   R    F   3.5            3.7   A
15Z: 3.3  3.2  3.3       3.2       2.8                 3.8  3.5  2.5  2.9   F    F   3.5            3.5  3.0
16Z: 3.1  3.3            3.1       3.1                 3.8  3.5  3.0  3.0  3.2   F    A             3.5  3.2
17Z: 3.1            3.2  3.2       2.9                 3.6  3.3  2.7  3.2  3.4  3.1  3.3            3.3  3.4
18Z:      3.0  3.0       3.0                           3.6  3.3   B   3.0  3.3       3.5            3.6  3.0
19Z:                                                   2.9  3.4  2.9  3.5  3.2       3.5                 3.0
20Z:                                                   3.7  3.1  3.2  3.0  3.3       3.1                 3.1
21Z:                                                   3.3  3.2  3.3  3.2   F        3.3                 3.2
22Z:                                                   3.3  2.9  3.3  3.2  3.2       3.0                 3.0
23Z:                                                   3.0  2.3  3.0  3.5            3.2                 3.0
=========================================
Estimated Average Global M(3000)F2:  3.17.


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

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


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

     MUR  ASH  SAL  DIX  MAG  SVE  TOM
     ---  ---  ---  ---  ---  ---  ---
00Z: 3.4       2.3       2.0  3.0
01Z: 4.4       2.7       2.0  3.2
02Z:           2.8
03Z:                          5.0
04Z:
05Z:                     2.0
06Z:
07Z:      3.5
08Z:
09Z:                          4.0
10Z: 2.0            2.3       2.7  2.3
11Z:                     1.3  2.8
12Z:                     2.0  4.0
13Z:                     2.3
14Z:                3.2  2.3
15Z:      2.5       3.8  2.3
16Z:                5.0  2.0
17Z: 2.9       3.0  6.0       5.0
18Z: 3.0                 2.0  5.0
19Z:
20Z:
21Z:
22Z:
23Z:


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

      MUR  ASH  SAL  DIX  MAG  SVE  TOM  JUL  UPS  WAR  POI  BOU  OTI  VBG  GOO  EIE  TAO  CHU  KEA  ARG  BER  NIC  DYS  LEA
     ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
00Z:       3.2  1.9       5.1            2.8  2.3   C   3.3  4.1       8.1  4.4  5.5   C       10.8   A    A   2.9   A   6.1
01Z:       3.2            6.4            2.0       2.4  3.5            3.6  3.1  5.1  8.3      11.3   B    A   3.0   A   5.8
02Z:       6.3            6.4             C        2.2  3.6            3.7  3.3   B    C       11.5   B    A   3.4   A   6.3
03Z:       4.6                           1.9  2.0   C   3.6            3.5  3.1   B   6.5       7.0   B    A   3.1   A   6.9
04Z:  3.3  5.9  2.8            2.6  5.7  2.0  2.4  2.3  2.8            3.2  3.3   B  10.4       4.8   B   4.0  3.4   A   8.1
05Z:            3.8       5.2  5.1       2.2  2.1  2.4  3.1            3.0  2.6  2.9 11.4       3.3   B    A   5.9   A   8.0
06Z:       6.1  4.5       4.2  6.3       2.2       2.7  2.9            5.0  2.4  3.8 10.8       3.3  2.7   B        4.3  8.0
07Z:       6.7  5.0  4.0  3.0  6.3       3.5       4.3  2.3            2.6  2.5   A   9.0       3.0   B    B        2.5  7.7
08Z:  3.3       5.5       2.1  5.8       4.8       5.9                 2.7   A    A   8.0       3.4   B    B         A   6.7
09Z:  4.3       4.7  3.3  1.8  6.0                                     2.9   B   4.3  6.0       2.2   B    B        3.2  5.8
10Z:  5.3       4.7       1.7  6.4  4.6                                3.1   B    A   3.7       2.2   B    B        3.1  5.7
11Z:  5.0       4.1       1.9  5.3  4.4                                2.7  3.5   A   3.3       2.5  3.6  4.4       3.1  4.6
12Z:  4.6       3.1  4.0  2.6  4.9  2.7                                2.7  3.8  4.0  4.4       3.3  5.2  5.9       3.0  4.6
13Z:  4.0  4.6  2.3  4.2  3.1  4.1  2.4                           4.0  2.8  4.6  3.7  4.0       3.4  6.3            4.2   A
14Z:  3.1  3.7  1.8       3.3  2.6  2.1                           5.1  3.5  5.5  3.3  2.4   R   4.0  7.0            5.7   A
15Z:  2.3  4.6  1.4       3.3  2.3  2.0                           5.8  5.2  6.2  4.3  2.4   F    F   7.1            6.6  5.2
16Z:  2.0  3.6            3.2       2.2                           7.1  5.8  6.3  3.3  2.6  4.6   F    A             7.0  5.2
17Z:  3.0            3.2  3.0       2.5                           7.2  5.8  6.2  3.4  2.9  4.7  3.9  6.5            7.7  4.7
18Z:       3.0  2.5       3.0                                     6.6  7.5  6.3   B   3.0  5.2       6.8            8.2  4.1
19Z:                                                                   8.3  6.2  3.9  3.5  5.3       5.3                 4.0
20Z:                                                                   8.7  5.3  4.9  2.4  5.8       4.5                 3.7
21Z:                                                                   7.4  4.6  5.2  2.8  5.8       4.1                 3.6
22Z:                                                                   6.9  2.8  6.2  2.3  6.1       3.5                 4.0
23Z:                                                                   8.3  4.3  7.3  5.7            2.3                 4.6
=========================================
Estimated Average Global foF2:  4.42 MHz.


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

      MUR  ASH  SAL  DIX  MAG  SVE  TOM  JUL  UPS  BOU  VBG  GOO  EIE  TAO  CHU  KEA  ARG  BER  NIC  DYS  LEA
     ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
00Z:       9.9  5.5      18.4            7.6  6.6 14.4 27.5 11.0 17.6   C       34.6   A    A   9.3   A  18.3
01Z:       9.6           21.8            5.8           12.6  9.0 15.3 29.1      36.2   B    A   9.0   A  16.8
02Z:      19.5           22.4             C             8.5  7.9   B    C       41.4   B    A  11.2   A  18.3
03Z:      14.3                           5.5  5.7      11.9  9.9   B  20.8      25.2   B    A  10.2   A  18.6
04Z:  9.6 18.9  8.7                19.9  6.2  6.8      10.9  9.2   B  33.3      17.8   B  12.8 10.2   A  22.7
05Z:           11.8      19.2 16.3       7.3  6.4       9.6  7.5  8.1 38.8      11.6   B    A  21.8   A  23.2
06Z:       1.8 14.8      14.7 22.1       7.5           13.0  7.9 13.7 36.7      11.2  7.8   B       15.1 24.0
07Z:      20.1 16.5 13.2 11.1 22.1      11.9            7.3  6.8   A  29.7       8.7   B    B        7.5 23.1
08Z: 11.2      16.5       6.7           17.3            7.8   A    A  28.8      11.9   B    B         A  22.1
09Z: 14.6      16.0 10.6  5.8 22.2                      8.4   B  14.2 22.8        F    B    B       10.2 18.6
10Z: 18.0      16.4       4.8 22.4 16.6                 7.8   B    A  13.7       6.2   B    B       10.2 17.1
11Z: 16.0      14.4       5.3 18.0 15.0                 8.6 10.8   A  10.2       7.0 13.0 15.4       9.0 11.5
12Z: 15.2      10.2 11.6  7.8 16.2  8.4                 7.3 13.3 16.0 14.5       9.6 18.2 20.6       9.0 12.4
13Z: 12.8 12.9  7.6 12.2  9.3 12.3  7.2                 8.4 15.6  9.2 14.0      11.2 22.7           13.0   A
14Z: 10.2 10.4  5.4       9.9  7.8  6.5                11.2 18.7  7.9  8.4   R    F  24.5           21.1   A
15Z:  7.6 14.7  4.6      10.6       5.6                19.8 21.7 10.8  7.0   F    F  24.9           23.1 15.6
16Z:  6.2 11.9            9.9       6.8                22.0 22.1  9.9  7.8 14.7   F    A            24.5 16.6
17Z:  9.3           10.2  9.6       7.2                20.9 20.5  9.2  9.3 16.0 12.1 21.4           25.4 16.0
18Z:       9.0  7.5       9.0                          27.0 20.8   B   9.0 17.2      23.8           29.5 12.3
19Z:                                                   24.1 21.1 11.3 12.2 17.0      18.6                12.0
20Z:                                                   32.2 16.4 15.7  7.2 19.1      13.9                11.5
21Z:                                                   24.4 14.7 17.2  9.0   F       13.5                11.5
22Z:                                                   22.8  8.1 20.5  7.4 19.5      10.5                12.0
23Z:                                                   24.9  9.9 21.9 19.9            7.4                13.8
===============================================
Estimated Average Global MUF(3000)F2: 14.02 MHz.


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

      BOU  TAO  ANC  CNV  PAL  SHE  OSA
     ---- ---- ---- ---- ---- ---- ----
00Z:       200  130  110  360
01Z:   62  240  140       400
02Z:   51  290   90   90  330
03Z:       400   67   95  160
04Z:   38  600   33  100  100
05Z:   37  640   17  110   63
06Z:   37  590   16  100   47
07Z:   32  420   17   97   41
08Z:   31  250   17  100   41
09Z:   31  140   16  100   27
10Z:   32  120   16  110   26
11Z:   34  110   16  100   33
12Z:   33  120   16  110   35
13Z:   32  110   15  150   50
14Z:   35  110   16  170   60
15Z:       110   17  170   54
16Z:   85  110   17  170   40
17Z:  110  110   20  210   61
18Z:  150  100   35  230  120
19Z:        99   75  230  170
20Z:  160   87  100  220  230
21Z:        89  100  170  230
22Z:  170  110   95  180  290
23Z:  160  160  110  160  350


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)
WAR = Warsaw                     Poland              (N52W021)
POI = Poitiers                   France              (N46E000)
BOU = Boulder CO                 USA                 (N40W105)
OTI = Ottawa                     Canada              (N45W076)
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)
NIC = Nicosia                    Cyprus              (N35E033)
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.


