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From: oler@rho.uleth.ca (Cary Oler)
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Subject: Daily Summary of Ionospheric Data for 04 May
To: solar-daily@lut.fi
Date: Tue, 4 May 93 22:04:58 MDT
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                    ---------------------------------------
                    DAILY IONOSPHERIC SUMMARY FOR 04 MAY 93
                    ---------------------------------------


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

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


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

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


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

     MUR  DIX  KHA  SAL  MAG  TOM  ASH
     ---  ---  ---  ---  ---  ---  ---
00Z: 3.3
01Z: 3.0                      2.8
02Z:                          3.3  2.3
03Z:      3.3  3.3            2.5  3.0
04Z:      3.2  3.3            3.5  3.3
05Z:                               3.8
06Z:      4.0       4.0  3.3       3.8
07Z:           3.4  4.0  3.0       3.7
08Z:                          3.5  3.7
09Z:           3.0       2.1
10Z:           2.0       1.5
11Z:
12Z:
13Z:
14Z:
15Z:
16Z:
17Z:
18Z:
19Z:
20Z:
21Z:
22Z:
23Z:


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

      MUR  DIX  KHA  SAL  MAG  TOM  ASH  UPS  OTI
     ---- ---- ---- ---- ---- ---- ---- ---- ----
00Z:       5.0  6.3  4.7  4.8  5.7  5.1  3.7
01Z:  5.1       6.8  5.2       6.2  5.4  3.4
02Z:  5.0  6.0  7.0  5.4  5.0  6.4  6.5  3.2
03Z:  5.3       7.0  5.6  5.2  6.6  8.1  3.8
04Z:  5.2  5.0  7.0  5.6  5.5  7.0  7.8  4.9
05Z:  5.8  5.0  7.5  6.0       8.0  8.0  6.0
06Z:  6.1  5.2  8.0  6.4  6.0  7.9  7.4
07Z:  6.2  5.5  8.0  6.4  6.1  8.2  8.5
08Z:  7.8  6.0       6.7  6.2  7.8  8.7
09Z:  7.0  6.0  7.7  7.0  6.3  7.6  8.9
10Z:       6.0  8.7  7.0  6.9  7.3  9.4
11Z:  6.5  6.0       6.8  6.9  7.3  9.4
12Z:  6.3  5.9       6.8  6.6  7.4  9.2       5.2
13Z:                                          6.0
14Z:                                          6.1
15Z:                                          6.0
16Z:                                          6.0
17Z:                                          6.0
18Z:                                          6.3
19Z:
20Z:
21Z:
22Z:
23Z:


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

      MUR  DIX  KHA  SAL  MAG  TOM  ASH  UPS
     ---- ---- ---- ---- ---- ---- ---- ----
00Z:      14.0 17.0 14.6      17.1 13.3 10.4
01Z: 15.8      19.7 15.6      19.2 14.6  9.2
02Z: 15.5 15.0 21.0 16.2      19.8 18.9  9.1
03Z: 16.4      21.7 16.8 15.1 20.5 24.3 11.6
04Z: 16.1      21.7 16.2 16.0 20.3 24.2 14.9
05Z: 17.4      23.2 16.8      24.8 23.2 18.9
06Z: 18.3      24.0 19.8 18.0 23.7 20.7
07Z: 17.4 15.4 24.8 18.6 19.5 24.6 22.1
08Z: 21.8 16.8      20.1 19.8 23.4 22.6
09Z: 21.7 18.0 23.9 21.7 18.9 22.8 23.1
10Z:      17.4 27.0 21.7 21.4 23.4 26.3
11Z: 20.1 17.4      21.1 20.7 21.9 27.3
12Z: 19.5 17.7      21.1 19.8 22.9 25.8
13Z:
14Z:
15Z:
16Z:
17Z:
18Z:
19Z:
20Z:
21Z:
22Z:
23Z:


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

      PAL  SHE  OSA  TAO  CNV  BOU  ANC
     ---- ---- ---- ---- ---- ---- ----
00Z:  480  100       310       280  130
01Z:  440  130       360  260  250  120
02Z:  390  150       430  190  240  110
03Z:  340   62       490  160  220  100
04Z:  320   64       530  150        97
05Z:  280   86       560  150  210   63
06Z:  230  150       540  150        61
07Z:  160  150       500  150        59
08Z:  140  150       550  150        56
09Z:  130  150       600  150        50
10Z:  110  100       490  150        41
11Z:  100            480  150        23
12Z:   90   23       630  180        21
13Z:   62            580  200  210   22
14Z:   76            490  220  250   25
15Z:   69            410  270  290   53
16Z:   72            470  330  340   89
17Z:  140            420  350  370  130
18Z:  220   21       320  360  390  160
19Z:  280   79       180  360  380  170
20Z:        77       100  350  380  160
21Z:  350   80       100  320  350  140
22Z:  380   82       130  300  320  130
23Z:  440   84       170  300  290  120


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

MUR = Murmansk                   USSR                (N68E033)
DIX = Dixon                      USSR                (N74E081)
KHA = Khabarovsk                 USSR                (N48E135)
SAL = Salekhard                  USSR                (N66E066)
MAG = Magadan                    USSR                (N60E151)
TOM = Tomsk                      USSR                (N56E085)
ASH = Ashkhabad                  USSR                (N37E058)
UPS = Uppsala                    Sweden              (N60E018)
OTI = Ottawa                     Canada              (N45W076)
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.


