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From: oler@rho.uleth.ca (Cary Oler)
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Subject: Daily Summary of Ionospheric Data for 16 May
To: solar-daily@lut.fi
Date: Sun, 16 May 93 23:58:32 MDT
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                    ---------------------------------------
                    DAILY IONOSPHERIC SUMMARY FOR 16 MAY 93
                    ---------------------------------------


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

     ASH  SAL  TOM  DIX  KHA  MAG
     ---  ---  ---  ---  ---  ---
00Z: 2.6  2.9  3.3
01Z: 2.8  2.8  3.1
02Z: 2.7  2.8  3.0
03Z: 2.7  3.0  3.0
04Z:           2.8
05Z:           2.1            2.8
06Z: 2.6  3.0  2.8       2.5
07Z:      3.0  3.0  2.6
08Z: 2.7  2.9  3.0
09Z:      3.0  3.1  2.8       2.9
10Z:      3.1  2.9  2.9       3.0
11Z:      3.2       2.9       3.0
12Z:
13Z:
14Z:
15Z:
16Z:
17Z:
18Z:
19Z:
20Z:
21Z:
22Z:
23Z:


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

     ASH  SAL  TOM  DIX  KHA  MAG
     ---  ---  ---  ---  ---  ---
00Z: 2.0  1.0  1.3  1.0  1.2
01Z: 2.0  1.0  1.0  2.0  1.1  1.0
02Z: 2.0  1.0  1.0       1.2  1.0
03Z: 2.0  1.0  1.1  3.0  1.2  1.0
04Z: 2.0       1.6       1.1  1.4
05Z: 2.0       1.6       1.2  1.4
06Z: 2.0  3.3  1.3       1.1
07Z: 2.0  1.0  1.3  3.2  1.0
08Z: 2.0  1.0  1.2  2.0  1.0
09Z:      1.0  1.0  3.2       1.1
10Z:      1.0  1.0  1.6       1.1
11Z:      1.0       1.4       1.0
12Z:
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: 3.1  4.8  2.5  3.5  5.5
01Z: 2.7  4.1  3.0  3.0  5.7  5.3
02Z: 2.5       3.4       4.0  5.4
03Z: 3.0       3.7            3.6
04Z: 8.3       3.9
05Z: 9.4       4.3       3.2  4.6
06Z: 8.6       5.7       4.8
07Z:  10       5.0       7.2
08Z: 6.0       3.1       6.9
09Z:           3.3            2.3
10Z:           3.3  3.0       2.1
11Z:                3.0       2.0
12Z:
13Z:
14Z:
15Z:
16Z:
17Z:
18Z:
19Z:
20Z:
21Z:
22Z:
23Z:


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

      ASH  SAL  TOM  DIX  KHA  MAG
     ---- ---- ---- ---- ---- ----
00Z:  5.2  5.0  6.0
01Z:  5.0  4.5  6.4  4.5       4.9
02Z:  6.5  5.0  6.6
03Z:  7.4  5.4  6.9  5.0       4.7
04Z:            7.4
05Z:            7.3            5.4
06Z:  8.4  6.3  7.5       5.9
07Z:       6.5  8.0  5.5
08Z: 10.4  6.1  7.6  5.6
09Z:       6.6  6.8  5.8       5.4
10Z:       6.7  7.0  5.8       5.8
11Z:       6.5       5.8       6.0
12Z:
13Z:
14Z:
15Z:
16Z:
17Z:
18Z:
19Z:
20Z:
21Z:
22Z:
23Z:


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

      ASH  SAL  TOM  DIX  KHA  MAG
     ---- ---- ---- ---- ---- ----
00Z: 13.5 14.5 19.8
01Z: 14.0 12.6 19.8
02Z: 17.6 14.0 19.8
03Z: 20.0 16.2 20.7
04Z:           20.7
05Z:           15.3           15.1
06Z: 21.8 18.9 21.0      14.8
07Z:      19.5 24.0 14.3
08Z: 28.1 17.7 22.8
09Z:      19.8 21.1 16.2      15.7
10Z:      20.8 20.3 16.8      17.4
11Z:      20.8      16.8      18.0
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:  400            160  330       150
01Z:  380            230  270       150
02Z:  410            310  220       140
03Z:  440            370  180       140
04Z:  450            400  170  200  150
05Z:  440            460  180  200  150
06Z:  360            510  190  200  120
07Z:  260            560  210  200   89
08Z:  230            550  200  190   48
09Z:  160            530  150  190   80
10Z:  140            500  130  180   58
11Z:  100            390  120  170   41
12Z:   92            380  170  170   37
13Z:   87            400  210  220   44
14Z:   83            420  240  280   57
15Z:   81            290  290  320   84
16Z:  110            330  330  290  120
17Z:  150            320  350  300  160
18Z:  190            230  380  320  190
19Z:  230            160       320  180
20Z:  290            130       320  160
21Z:  350            170  330  310  160
22Z:  410            230       310  150
23Z:  480                 330  300  150


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

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.


