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From: oler@rho.uleth.ca (Cary Oler)
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Subject: Daily Summary of Ionospheric Data for 26 December
To: solar-daily@lut.fi
Date: Sun, 26 Dec 93 23:31:41 MST
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                    ---------------------------------------
                    DAILY IONOSPHERIC SUMMARY FOR 26 DEC 93
                    ---------------------------------------


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

     MUR  ASH  SVE  SAL  TOM  DIX  MAG  WLP  MAU  VBG  GOO  EIE  TAO  CHU  KEA  ARG  BER  NIC  DYS  LEA
     ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---
00Z:      3.1  2.9  3.0  3.2       3.6  3.1  3.1  3.6  3.1  3.2  3.6       3.1   B        3.3  3.4  3.1
01Z:      3.3       3.3  3.2       3.6  3.1  3.5  3.6  2.9  3.1  3.6       3.5   B        3.5  3.3  2.9
02Z: 3.1  3.0       3.1  3.2  3.0  3.8  2.7  3.4  3.2  2.6  3.1  3.5       3.4   B        3.6   B   2.8
03Z: 3.1  3.2  3.1  3.1  3.4            2.8  3.5  3.3  3.0  2.6  3.3       3.5   B        3.1   B   2.9
04Z: 3.1       3.1  3.3  3.6       3.8  2.8  3.4  3.0  2.4  4.6  3.3       3.4   B        3.2  3.3  2.8
05Z: 3.1  3.2       3.3  3.4       3.6  2.6  3.4  3.1  2.4   B   3.4       3.4   B        3.6  3.4  2.8
06Z: 3.3  3.2  3.5  3.4  3.8  3.4  3.6  2.8  3.2  2.6   A    B   3.5       3.2   B        3.8  3.2  2.9
07Z: 2.8       3.5  3.3  3.8  3.4       2.9  3.2  3.2  2.9   B   3.2       3.2   B         C   3.1  3.1
08Z: 3.5       3.5       3.8  3.4  3.2  3.3  3.2  3.3  2.9  4.0  3.3       3.3   B        3.6  3.2  2.9
09Z: 3.4  3.2  3.3  3.5  3.1  3.3  3.2  3.2  3.6  2.9   A    A   3.5       3.6   B        3.5  3.4  3.1
10Z:      3.2  3.4  3.4  3.4  3.3  3.0  3.0  2.8  3.1   A   2.6  3.4       2.9   B        3.7  3.1  3.5
11Z:      3.2  3.3  3.3  3.2  3.3  3.0  3.0  3.0  3.0  2.6  2.8  3.3       3.0  3.5       3.9  3.1  3.0
12Z: 3.3  3.3  3.3  3.3  3.0       2.9  3.5  3.2  2.8  3.5  2.9  3.4       3.3  3.6        C   2.9  3.4
13Z: 3.2       3.2  3.2  3.4       2.8  3.6  3.7  3.0  3.6   A   3.5       3.7  3.5       3.6       3.5
14Z:      3.0                 3.1       3.3  3.0  3.4  3.5   A   3.4   C   3.0  3.6       3.9  3.5  3.5
15Z:      3.2  3.1       2.9  3.2       3.2  2.8  3.6  3.4   A    A    C   2.9   A        3.5  3.7  3.8
16Z: 3.4  3.1  2.9       3.2            3.4  2.8  3.6  3.4   A   2.9   F   2.9  3.3  3.6  3.2  3.6  3.4
17Z:           2.7       2.7  3.1       3.4  3.1  3.6  3.3   A   3.1   I   3.1  3.5  3.6  3.5  3.1  3.4
18Z: 3.1       2.8            2.9       3.4       3.8  3.3  2.8  3.0  3.3       3.5       3.2  3.6  3.3
19Z:                                    3.4       3.4  3.2   B   3.5   I        3.5       3.5  3.4  3.0
20Z:                                    3.4       3.4  3.3  3.1  2.9  3.2       3.1       3.0  3.5  3.0
21Z:                                    3.4       3.6   A   3.1  2.8  3.3       2.9       3.1  3.2  3.5
22Z:                                    3.2       3.4  2.8  3.1  3.0  3.2       3.0       3.0  3.4  3.4
23Z:                                    3.4       3.5  2.6  3.4  3.0            2.9       2.9  3.5  2.7
=========================================
Estimated Average Global M(3000)F2:  3.24.


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

     MUR  ASH  SVE  SAL  TOM  DIX  MAG
     ---  ---  ---  ---  ---  ---  ---
00Z: 1.0  1.6  1.8  1.0  1.0  1.8  1.0
01Z: 1.0  2.0  1.8  1.0  1.0  2.0  1.0
02Z: 1.0  2.0  1.0  1.0  1.0  1.4  1.0
03Z: 1.5  2.0  1.4  1.0  1.0
04Z: 1.3       1.5  1.0  1.1       1.0
05Z: 1.3  2.0       1.0  1.0       1.0
06Z: 1.0  2.0  1.0  1.0  1.3  1.2  1.0
07Z: 1.0       1.0  1.6  1.0  1.7  1.0
08Z: 1.0       1.6       1.4  1.1  1.0
09Z: 1.0  2.0  1.0  1.0  1.0  1.0  1.0
10Z:      2.0  1.0  1.0  1.0  1.0  1.0
11Z:      2.0  2.0  1.0  1.0  1.5  1.0
12Z: 1.0  2.0  1.0  1.0  1.0  1.6  1.0
13Z: 1.5       1.8  1.0  1.3  1.3  1.0
14Z: 1.0  2.0  1.6  1.0  1.3  1.0  1.0
15Z: 1.3  2.0  1.6  1.0  1.2  1.0  1.0
16Z: 1.2  2.0  1.7  1.0  1.0  2.6
17Z:           1.6  1.0  1.0  1.0
18Z: 1.5       1.7  1.0       1.0
19Z:
20Z:
21Z:
22Z:
23Z:


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

     MUR  ASH  SVE  SAL  TOM  DIX  MAG
     ---  ---  ---  ---  ---  ---  ---
00Z: 5.0                      4.0  1.8
01Z: 3.8                      4.0  2.0
02Z: 2.8                 3.0  3.2  1.9
03Z:                2.0  6.0
04Z:                     3.4       2.1
05Z:      2.7       2.0  3.4       1.6
06Z:      3.6  4.0  2.5            1.2
07Z: 1.7       3.0            2.0  2.1
08Z:                               1.7
09Z:           3.0  2.0            1.6
10Z:           2.8       1.6  1.9  2.1
11Z:                5.0
12Z: 2.1       4.0  5.0       2.0
13Z:                6.0       3.0
14Z: 3.6            1.5       4.4  1.6
15Z: 3.0            2.3       6.2
16Z: 4.0  2.8       1.4       5.2
17Z:                1.4       3.6
18Z:                4.5       4.2
19Z:
20Z:
21Z:
22Z:
23Z:


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

      MUR  ASH  SVE  SAL  TOM  DIX  MAG  WLP  MAU  VBG  GOO  EIE  TAO  CHU  KEA  ARG  BER  NIC  DYS  LEA
     ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
00Z:       3.2  2.6  3.2  3.0       5.5  3.8 10.2  6.4  2.8  5.2  7.6      10.2   B        3.4  4.3  6.2
01Z:       3.3  2.3  2.6  2.7       6.5  3.0 10.7  3.3  2.3  4.6  7.0      10.7   B        3.7  2.3  6.8
02Z:  3.6  3.0  2.5  2.4  2.7  2.9  6.8  2.5  7.4  2.4  2.8  4.6  9.5       7.4   B        3.0   B   7.7
03Z:  2.8  3.6  2.2  2.0  4.9            2.8  6.3  2.8  2.0  3.7 10.2       6.3   B        2.6   B   8.6
04Z:  2.5       3.0  2.2  5.8       6.0  2.6  5.5  2.5  2.8  3.7  9.8       5.5   B        3.0  2.8  8.7
05Z:  2.5  5.3       3.5  6.6       5.2  2.6  4.4  3.0  2.4   B  10.8       4.4   B        5.8  2.8  8.6
06Z:  1.5  6.1  6.0  4.8  6.8  3.2  4.3  3.4  3.1  3.2   A    B  10.0       3.1   B        6.6  2.7  8.5
07Z:  2.8       6.2  5.0  7.0  3.8       3.9  4.2  3.6  2.1   B   8.3       4.2   B         C   3.2  8.3
08Z:  4.0       6.5       7.8  3.2  2.4  4.0  4.6  3.5  2.4  3.9  8.1       4.6   B        7.1  3.6  8.8
09Z:  5.0  6.2  6.0  5.1  5.6  2.9  1.9  4.0  3.7  3.1   A    A   9.0       3.7   B        7.7  3.6  7.6
10Z:       6.2  6.4  4.9  5.4  2.7  1.9  3.4  3.1  3.1   A   3.6  7.0       3.1   B        8.3  3.7  6.7
11Z:       6.5  5.3  4.2  3.8  2.0  2.2  3.4  3.2  3.5  2.4  2.9  5.8       3.2  4.2       5.6  3.6  8.3
12Z:  4.7  6.6  4.8  3.5  3.6       2.6  4.8  3.0  3.3  4.7  3.2  6.2       3.0  6.0        C   3.4  5.2
13Z:  3.8       3.8  2.3  2.9       2.9  5.9  3.2  2.7  6.1   A   5.5       3.2  7.3       8.3       5.8
14Z:      14.3  3.3            4.2       6.1  2.9  2.9  6.9   A   2.8   C   2.9  7.3       6.1  5.8  4.7
15Z:       4.1  2.4       2.4  4.0       7.9  2.0  5.6  7.8   A    A    C   2.0   A        3.5  5.9  3.1
16Z:  3.0  2.9  2.2       2.8            9.1  2.2  6.6  7.9   A   2.7   F   2.2  7.5  8.3  3.6  5.9  4.9
17Z:            2.2       3.0  4.0       8.1  3.9  5.7  8.0   A   3.0   I   3.9  7.9  8.2  3.6  8.0  4.4
18Z:  3.7       2.4            4.0       8.0       5.7  7.9  3.6  3.1  8.5       7.7       3.4  9.5  4.6
19Z:                                     7.8       9.4  6.6   B   3.3   I        6.1       2.8  7.7  5.0
20Z:                                     7.4       9.5  5.8  5.2  2.5  7.7       5.3       2.8  7.7  4.7
21Z:                                     6.1       7.8   A   5.7  2.5  7.3       4.4       2.9  7.0  4.5
22Z:                                     5.7       7.0  2.9  6.0  2.6  7.4       3.4       2.9  7.4  5.4
23Z:                                     5.4       8.0  2.7  6.5  5.5            3.2       3.0  7.4  6.9
=========================================
Estimated Average Global foF2:  4.87 MHz.


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

      MUR  ASH  SVE  SAL  TOM  DIX  MAG  WLP  MAU  VBG  GOO  EIE  TAO  CHU  KEA  ARG  BER  NIC  DYS  LEA
     ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
00Z:       9.9  7.5  9.6  9.6      19.8 11.8 31.6 23.0  8.7 16.6 27.4      31.6   B       11.2 14.6 19.2
01Z:      10.9       8.6  8.6      23.4  9.3 36.9 11.9  6.7 14.3 25.2      37.5   B       12.9  7.6 19.7
02Z: 11.2  9.0       7.4  8.6  8.7 25.8  6.8 25.2  7.7  7.3 14.3 33.2      25.2   B       10.8   B  21.6
03Z:  8.7 11.5  6.8  6.2 16.7            7.8 21.7  9.2  6.0  9.6 33.7      22.1   B        8.1   B  24.9
04Z:  7.8       9.3  7.3 20.9      22.8  7.3 18.7  7.5  6.7 17.0 32.3      18.7   B        9.6  9.2 24.4
05Z:  7.8 17.0      11.6 22.4      18.7  6.8 15.0  9.3  5.8   B  36.7      15.0   B       20.9  9.5 24.1
06Z:  4.9 19.5 21.0 16.3 25.8 10.9 15.5  9.5  9.8  8.3   A    B  35.0       9.9   B       25.1  8.6 24.7
07Z:  7.8      21.7 16.5 26.6 12.9      11.3 13.2 11.5  6.1   B  26.6      13.4   B         C   9.9 25.7
08Z: 14.0      22.8      29.6 10.9  7.7 13.2 14.9 11.6  7.0 15.6 26.7      15.2   B       25.6 11.5 25.5
09Z: 17.0 19.8 19.8 17.9 17.4  9.6  6.1 12.8 13.3  9.0   A    A  31.5      13.3   B       26.9 12.2 23.6
10Z:      19.8 21.8 16.7 18.4  8.9  5.7 10.2  8.8  9.6   A   9.4 23.8       9.0   B       30.7 11.5 23.4
11Z:      20.8 17.5 13.9 12.2  6.6  6.6 10.2  9.4 10.5  6.2  8.1 19.1       9.6 14.7      21.8 11.2 24.9
12Z: 15.5 21.8 15.8 11.6 10.8       7.5 16.8  9.8  9.2 16.4  9.3 21.1       9.9 21.6        C   9.9 17.7
13Z: 12.2      12.2  7.4  9.9       8.1 21.2 11.8  8.1 22.0   A  19.2      11.8 25.6      29.9      20.3
14Z:      42.9                13.0      20.1  8.7  9.9 24.1   A   9.5   C   8.7 26.3      23.8 20.3 16.4
15Z:      13.1  7.4       7.0 12.8      25.3  5.7 20.2 26.5   A    A    C   5.8   A       12.2 21.8 11.8
16Z: 10.2  9.0  6.4       9.0           30.9  6.3 23.8 26.9   A   7.8   F   6.4 24.8 29.9 11.5 21.2 16.7
17Z:            5.9       8.1 12.4      27.5 12.1 20.5 26.4   A   9.3   I  12.1 27.6 29.5 12.6 24.8 15.0
18Z: 11.5       6.7           11.6      27.2      21.7 26.1 10.1  9.3 28.0      26.9      10.9 34.2 15.2
19Z:                                    26.5      32.0 21.1   B  11.6   I       21.4       9.8 26.2 15.0
20Z:                                    25.2      32.3 19.1 16.1  7.2 24.6      16.4       8.4 26.9 14.1
21Z:                                    20.7      28.1   A  17.7  7.0 24.1      12.8       9.0 22.4 15.8
22Z:                                    18.2      23.8  8.1 18.6  7.8 23.7      10.2       8.7 25.2 18.4
23Z:                                    18.4      28.0  7.0 22.1 16.5            9.3       8.7 25.9 18.6
===============================================
Estimated Average Global MUF(3000)F2: 15.77 MHz.


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

      TAO  ANC  CNV  PAL  BOU  SHE  OSA
     ---- ---- ---- ---- ---- ---- ----
00Z:  260  190  120  310
01Z:  390  130  110  270  110
02Z:  570   97   99  170   76
03Z:  610   88  100  140   74
04Z:  620   62  100   99   74
05Z:  560   23  110   76   72
06Z:  460   20  110   52   72
07Z:  370   20  220   54   74
08Z:  330   18  120   53   73
09Z:  280   17  120   53   74
10Z:  220   18  120   34   76
11Z:  190   19  110   35   76
12Z:  160   20  120   37   76
13Z:  130   20  160   41   76
14Z:  110   20  190   36   79
15Z:  110   19  200   35  110
16Z:  110   20  190   40  130
17Z:  110   22  230   66  190
18Z:  100   43  260  160  210
19Z:   99   84  260  210  250
20Z:   87  130  230  240  260
21Z:   80  160  200  270
22Z:       190  180  340  210
23Z:       190  170  370  240


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

MUR = Murmansk                   USSR                (N68E033)
ASH = Ashkhabad                  USSR                (N37E058)
SVE = Sverdlovsk                 USSR                (N56E061)
SAL = Salekhard                  USSR                (N66E066)
TOM = Tomsk                      USSR                (N56E085)
DIX = Dixon                      USSR                (N74E081)
MAG = Magadan                    USSR                (N60E151)
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)
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)
BOU = Boulder CO                 USA                 (N40W105)
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.


