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From: oler@rho.uleth.ca (Cary Oler)
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Subject: Daily Summary of Ionospheric Data for 19 May
To: solar-daily@lut.fi
Date: Wed, 19 May 93 23:37:48 MDT
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                    ---------------------------------------
                    DAILY IONOSPHERIC SUMMARY FOR 19 MAY 93
                    ---------------------------------------


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

     SAL  TOM  KHA  MAG  ASH  DIX  UPS
     ---  ---  ---  ---  ---  ---  ---
00Z: 2.8  2.8  3.1  3.0  2.6
01Z: 2.8  2.5       3.0  2.6       3.0
02Z: 2.8  2.9  2.7  3.1  2.7  2.2
03Z:      3.0  2.9       2.9       2.8
04Z:                               2.7
05Z:      3.0  2.8  3.0       2.3  2.8
06Z:
07Z: 2.9  3.1  3.0  3.2  2.6
08Z: 2.8  3.0  3.0  3.0
09Z: 3.0  3.0  3.1  3.1  2.9
10Z:      3.0  3.0  3.2  2.9  2.9
11Z: 3.0       3.1  3.2  2.8  2.8
12Z:
13Z:
14Z:
15Z:
16Z:
17Z:
18Z:
19Z:
20Z:
21Z:
22Z:
23Z:


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

     SAL  TOM  KHA  MAG  ASH  DIX
     ---  ---  ---  ---  ---  ---
00Z: 1.0  1.0  1.3  1.0  2.0  3.0
01Z: 1.0  1.0       1.0  2.0  1.2
02Z: 1.0  1.0  1.1  1.0  2.0  1.2
03Z:      1.4  1.2  1.0  2.0
04Z:                1.0
05Z: 1.0  1.0  1.3  1.0       3.2
06Z:                          3.0
07Z: 1.0  1.3  1.3  1.0  2.0  1.2
08Z: 3.3  1.8  1.3  1.0
09Z: 3.2  1.5  1.2  1.0  2.0  1.2
10Z:      1.0  1.3  1.1  2.0  1.2
11Z: 1.8       1.1  1.0  2.0  3.0
12Z:
13Z:
14Z:
15Z:
16Z:
17Z:
18Z:
19Z:
20Z:
21Z:
22Z:
23Z:


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

     SAL  TOM  KHA  MAG  ASH  DIX
     ---  ---  ---  ---  ---  ---
00Z:      2.6  3.6       2.5  5.4
01Z:      3.0            2.2  4.0
02Z:      3.2  3.8  3.6  2.8
03Z:      3.4  4.0  3.4  4.1
04Z:                3.3
05Z: 7.5  3.4  3.5  3.3
06Z:
07Z: 5.0       3.8  3.4  3.8
08Z:      3.3  3.2  2.4
09Z:      2.3  3.0  2.5  3.9
10Z:           3.3  1.8  3.7
11Z:           3.0
12Z:
13Z:
14Z:
15Z:
16Z:
17Z:
18Z:
19Z:
20Z:
21Z:
22Z:
23Z:


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

      SAL  TOM  KHA  MAG  ASH  DIX  UPS  POI  OTI
     ---- ---- ---- ---- ---- ---- ---- ---- ----
00Z:  4.4  4.8  6.3  5.6  5.4       4.2  5.8
01Z:  4.5  5.6       5.1  5.6       3.2  6.0
02Z:  4.5  6.0  6.0  5.5  6.2  4.2  4.2  5.5
03Z:       6.2  6.3  5.3  7.0       4.2  5.1
04Z:                 5.4            4.4  4.5
05Z:       7.0  6.0  5.5       5.0  4.7  4.5
06Z:                           5.2       5.2
07Z:  6.1  7.0  7.0  6.0  9.0  5.2       5.6
08Z:  6.1  6.5  7.0  6.0
09Z:  5.9  6.8  7.0  6.5  9.1  5.2
10Z:       6.8  7.4  6.6  7.2  5.8
11Z:  5.9       7.6  7.1  6.9  5.5
12Z:                                          4.2
13Z:                                          4.4
14Z:                                          4.6
15Z:                                          4.7
16Z:                                          5.0
17Z:                                          5.0
18Z:                                          5.3
19Z:
20Z:
21Z:
22Z:
23Z:


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

      SAL  TOM  KHA  MAG  ASH  DIX  UPS
     ---- ---- ---- ---- ---- ---- ----
00Z: 12.3 13.4 19.5 16.8 14.0
01Z: 12.6 14.0      15.3 14.6       9.4
02Z: 12.6 17.4 16.2 17.0 16.7  9.2
03Z:      18.6 18.3      20.3      11.8
04Z:                               11.9
05Z:      21.0 16.8 16.5      11.5 12.9
06Z:
07Z: 17.7 21.7 21.0 19.2 23.4
08Z: 17.1 19.5 21.0 18.0
09Z: 17.7 20.4 21.7 20.1 26.4
10Z:      20.4 22.2 21.1 20.9 16.8
11Z: 17.7      23.6 22.7 19.3 15.4
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:  460            150       300  150
01Z:  530            170  300       150
02Z:  600            190  230       150
03Z:  610            250  200  270  140
04Z:  550            300  170  220  140
05Z:  530            350  170  190  130
06Z:  440            420  180  170  110
07Z:  300            450  180  180  110
08Z:  220            440  160  180  110
09Z:  180            390  150  190   73
10Z:  150            350  150  190   55
11Z:  140            300  140        54
12Z:  140            210  160  180   58
13Z:  110            180  190  220   61
14Z:   81            180  220        63
15Z:   66            180  260        97
16Z:   85            220  290  290  130
17Z:  140            240  320  290  170
18Z:  200            200  340  290  190
19Z:  260            120  330  280  240
20Z:  300                 300  260  230
21Z:                           260  220
22Z:       180                 250
23Z:       190                 250


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

SAL = Salekhard                  USSR                (N66E066)
TOM = Tomsk                      USSR                (N56E085)
KHA = Khabarovsk                 USSR                (N48E135)
MAG = Magadan                    USSR                (N60E151)
ASH = Ashkhabad                  USSR                (N37E058)
DIX = Dixon                      USSR                (N74E081)
UPS = Uppsala                    Sweden              (N60E018)
POI = Poitiers                   France              (N46E000)
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.


