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From: oler@rho.uleth.ca (Cary Oler)
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Subject: Daily Summary of Ionospheric Data for 15 May
To: solar-daily@lut.fi
Date: Sun, 16 May 93 0:02:21 MDT
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                    ---------------------------------------
                    DAILY IONOSPHERIC SUMMARY FOR 15 MAY 93
                    ---------------------------------------


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

     MUR  ASH  SAL  TOM  DIX  KHA  MAG
     ---  ---  ---  ---  ---  ---  ---
00Z: 2.9  2.9  2.8  2.7  2.6  2.6
01Z: 2.8  2.9  2.8  2.9  2.6       2.8
02Z: 2.8  3.1  2.7  3.0  2.5  2.8  3.0
03Z: 2.8  3.1  2.5  2.8  2.3  2.7
04Z:      2.9  2.8  3.0  2.4  3.1
05Z:      3.1  2.9  3.1  2.4  2.4
06Z:      2.6       3.0  2.4  2.7  2.8
07Z:      2.6       3.1  2.3
08Z:      2.6       3.1  2.4  2.9  3.0
09Z:      2.6       3.1       3.1  3.1
10Z:      2.6       3.0  2.7  2.9  3.0
11Z:      2.7       3.2  2.8  3.0  3.0
12Z:                     2.8       3.1
13Z:
14Z:
15Z:
16Z:
17Z:
18Z:
19Z:
20Z:
21Z:
22Z:
23Z:


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

     MUR  ASH  SAL  TOM  DIX  KHA  MAG
     ---  ---  ---  ---  ---  ---  ---
00Z: 1.0  2.0  1.0  1.4  1.4  1.8  1.3
01Z: 1.5  2.0  1.0  1.5  1.4  2.7  1.2
02Z: 1.0  2.0  1.0  1.4  2.9  1.2  1.0
03Z: 1.0  2.0  1.0  1.3  1.0  1.7
04Z: 1.0  2.0  1.0  1.2  1.3  1.4  1.0
05Z: 1.0  2.0  1.0  1.8  1.0  1.2  1.0
06Z:      2.0       1.8  1.2  1.2  1.0
07Z:      2.0       1.7  1.3
08Z:      2.0       1.6  1.3  1.2  1.0
09Z:      2.0       1.2       1.1  1.0
10Z:      2.0       1.2  3.0  1.3  1.0
11Z:      2.0       1.2  2.8  1.4  1.0
12Z:                     1.0       1.0
13Z:
14Z:
15Z:
16Z:
17Z:
18Z:
19Z:
20Z:
21Z:
22Z:
23Z:


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

     ASH  SAL  TOM  DIX  KHA  MAG
     ---  ---  ---  ---  ---  ---
00Z:                3.2  4.2  4.2
01Z: 3.2       3.0  3.0  4.3  3.8
02Z: 2.7       3.2       2.8  3.6
03Z: 3.2                 5.2
04Z: 4.2       3.6       5.0  3.4
05Z: 4.0  3.5  3.5       3.7  3.2
06Z: 4.0       3.8       2.8  3.1
07Z: 3.9       3.6
08Z: 3.9                 4.6  2.3
09Z: 3.8                 3.2  1.5
10Z: 3.8                 3.4  1.9
11Z: 4.0                      1.4
12Z:
13Z:
14Z:
15Z:
16Z:
17Z:
18Z:
19Z:
20Z:
21Z:
22Z:
23Z:


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

      MUR  ASH  SAL  TOM  DIX  KHA  MAG
     ---- ---- ---- ---- ---- ---- ----
00Z:  5.0  4.4  5.0  5.1  5.2  5.7  5.0
01Z:  5.0  4.7  5.1  5.4  5.0       5.2
02Z:  5.0  6.2  5.1  5.4  5.0  6.2  5.2
03Z:  5.0  8.1  5.0  5.5  5.0  6.0
04Z:  5.0  8.7  5.1  5.7  5.2  5.5  5.1
05Z:       7.4  5.4  6.1  5.2  6.0  5.4
06Z:       8.0       6.5  5.2  6.6  5.4
07Z:       9.1       6.6  5.2
08Z:       9.4       6.3  5.1  6.8  5.7
09Z:       9.0       6.1       6.3  5.9
10Z:       8.4       6.3  5.2  6.7  6.1
11Z:       9.1       6.2  5.5  7.3  6.9
12Z:                      5.5       6.5
13Z:
14Z:
15Z:
16Z:
17Z:
18Z:
19Z:
20Z:
21Z:
22Z:
23Z:


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

      MUR  ASH  SAL  TOM  DIX  KHA  MAG
     ---- ---- ---- ---- ---- ---- ----
00Z: 14.5 12.8 14.0 13.8 13.5 14.8
01Z: 14.0 13.6 14.3 15.7 13.0      14.6
02Z: 14.0 19.2 13.8 16.2 12.5 17.4 15.6
03Z: 14.0 25.1 12.5 15.4 11.5 16.2
04Z:      25.2 14.3 17.1 12.5 17.0
05Z:      22.9 15.7 18.9 12.5 14.4
06Z:      20.8      19.5 12.5 17.8 15.1
07Z:      23.7      20.5 12.0
08Z:      24.4      19.5 12.2 19.7 17.1
09Z:      23.4      18.9      19.5 18.3
10Z:      21.8      18.9 14.0 19.4 18.3
11Z:      24.6      19.8 15.4 21.9 20.7
12Z:                     15.4      20.1
13Z:
14Z:
15Z:
16Z:
17Z:
18Z:
19Z:
20Z:
21Z:
22Z:
23Z:


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

      PAL  SHE  OSA  TAO  CNV  BOU  ANC
     ---- ---- ---- ---- ---- ---- ----
00Z:  450            200  330  250  160
01Z:  430            250  240       140
02Z:  460            300  180  210  130
03Z:  460            350  160       120
04Z:  420            380  150       130
05Z:  390            410  140  170  130
06Z:  350            480  140  170  130
07Z:  260            540  150  170  110
08Z:  200            590  150  170  100
09Z:  150            580  120  160   81
10Z:  150            550  110  160   75
11Z:  140            410  120  160   70
12Z:  150            310  170        64
13Z:  120            280  200  210   62
14Z:   85            210  250  260   66
15Z:   84            200  260        90
16Z:   95            230  330  330  120
17Z:  180            180  370  330  150
18Z:  250            100  400  330  190
19Z:  260             53  420  340  210
20Z:  290             45  400       190
21Z:  340             82  410       170
22Z:  390            150  390  340  160
23Z:  440            150  400  290  150


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

MUR = Murmansk                   USSR                (N68E033)
ASH = Ashkhabad                  USSR                (N37E058)
SAL = Salekhard                  USSR                (N66E066)
TOM = Tomsk                      USSR                (N56E085)
DIX = Dixon                      USSR                (N74E081)
KHA = Khabarovsk                 USSR                (N48E135)
MAG = Magadan                    USSR                (N60E151)
PAL = Palehua HI                 USA                 (N21W158)
SHE = Shemya AK                  USA                 (N52E174)
OSA = Osan AB                    Korea               (N37E127)
TAO = Taoyuan                    Taiwan              (N25E121)
CNV = Cape Canaveral FL          USA                 (N28W080)
BOU = Boulder CO                 USA                 (N40W105)
ANC = Anchorage AK               USA                 (N61W150)


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.


