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From: oler@rho.uleth.ca (Cary Oler)
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Subject: Daily Summary of Ionospheric Data for 01 May
To: solar-daily@lut.fi
Date: Sun, 2 May 93 1:06:25 MDT
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                    ---------------------------------------
                    DAILY IONOSPHERIC SUMMARY FOR 01 MAY 93
                    ---------------------------------------


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

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


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

     MUR  ASH  SAL  TOM  DIX  KHA  MAG
     ---  ---  ---  ---  ---  ---  ---
00Z: 1.5  2.0  1.0  1.1  1.5  1.2  1.0
01Z: 1.0  2.0  1.0  1.0  2.2  1.2  1.0
02Z: 1.0  2.0  1.0  1.0  1.8  1.2  1.0
03Z: 1.0  2.0  1.0  1.0       1.0  1.0
04Z: 2.6  2.0  1.0  1.0       1.2  1.0
05Z: 1.7  2.0  1.0  1.0       1.1  1.0
06Z: 3.4  2.0  1.0  1.1  5.0  1.2  1.0
07Z: 2.4  2.0  1.0  1.1       1.1  1.0
08Z: 1.3  2.0  1.0  1.4  3.0  1.1  1.0
09Z: 1.0  2.0  1.0  1.1  1.4  1.2  1.0
10Z:      2.0  1.0  1.0  1.2       1.0
11Z:      2.0  1.0  1.0  1.0
12Z:
13Z:
14Z:
15Z:
16Z:
17Z:
18Z:
19Z:
20Z:
21Z:
22Z:
23Z:


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

     MUR  ASH  SAL  TOM  DIX  KHA  MAG
     ---  ---  ---  ---  ---  ---  ---
00Z: 3.8       3.6  2.5  3.1       4.0
01Z: 4.0            4.0  4.6       3.6
02Z:                4.1  4.5  4.0  3.5
03Z:      3.0       4.4            3.6
04Z:      3.8       3.4            3.4
05Z:      3.4       3.4
06Z:      3.6       3.6
07Z:      3.7
08Z:      3.8                 3.1
09Z:      3.7            3.0  3.4
10Z:      3.6       3.4  3.8
11Z:      3.5            5.2
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:  4.8  5.4  4.5  5.9  5.1  6.4  5.3
01Z:  4.8  5.3  5.3  6.3  5.5  7.1  5.6
02Z:  5.3  6.2  5.5  6.5  5.3  7.9  5.3
03Z:  5.3  7.7  5.7  7.2       7.3  5.8
04Z:  5.0  7.6  6.7  7.4       7.7  5.8
05Z:  5.0  8.3  6.0  7.5       8.0  6.0
06Z:  5.0  9.0  6.8  8.2  6.0  8.3  6.0
07Z:  5.0  9.6  6.5  8.1       8.0  5.9
08Z:  5.8 11.0  6.6  7.8  6.0  7.6  6.2
09Z:  6.0 11.2  6.3  7.9  5.4  7.0  6.7
10Z:      10.6  6.6  7.3  5.7       6.9
11Z:      11.4  6.7  7.6  6.0
12Z:
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: 12.5 13.5 13.5 18.3 13.3 19.2 14.8
01Z: 12.5 14.8 14.8 20.2      21.3 15.7
02Z: 15.9 18.6 15.4 19.5      22.9 16.4
03Z: 16.4 20.8 15.4 20.9      21.9 16.2
04Z:      22.8 19.4 22.2      22.3 17.4
05Z:      23.2 18.0 22.5      23.2 19.2
06Z:      24.3 19.0 23.8 15.0 25.7 19.2
07Z:      24.0 18.9 25.1      24.8 17.7
08Z: 15.7 29.7 19.1 23.4 16.8 22.8 18.6
09Z: 16.8 32.5 19.5 23.7 15.1 22.4 20.8
10Z:      29.7 19.8 21.9 14.2      20.7
11Z:      31.9 19.4 22.0
12Z:
13Z:
14Z:
15Z:
16Z:
17Z:
18Z:
19Z:
20Z:
21Z:
22Z:
23Z:


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

      PAL  SHE  OSA  TAO  CNV  BOU  ANC
     ---- ---- ---- ---- ---- ---- ----
00Z:  830  220            310  300  170
01Z:  870            400  290  290  170
02Z:  900            410  250  290  150
03Z:  900            540  210  260  140
04Z:  820            660  190  230  140
05Z:  670                 210       140
06Z:  490            860  200  200  140
07Z:  360            920  190  200  130
08Z:  220  300       890  190  190  110
09Z:  150  250        59  170  200   92
10Z:  140  280       840  150  190   76
11Z:  130  240       790  150        49
12Z:  110  320       620  210        56
13Z:  100  280       580  280  220   67
14Z:   95  300       530  360  280   85
15Z:   87  220       480  400  310   93
16Z:  100  240       370  410  290  110
17Z:  180  160       300  390  280  140
18Z:  260  190       170  380  290  170
19Z:  330  160        76  390  290  190
20Z:  420  230        59  330  300  190
21Z:  500  230        92  320  300  190
22Z:  620  170       130  280  290  170
23Z:  680  200       160  270       170


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.


