<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-11 -284 21:00:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.10.11 (284) 21:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.38" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202628410112100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.287" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.446" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="360.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="360.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="600.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.830" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="474.272" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="373.438" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.163" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="147.161" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="57.226" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="74.678" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="151.900" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.780" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="123">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
360.000 365.000 365.000 366.667 368.333 370.000 370.000 370.000 370.000 385.000 375.000 380.000 385.000 387.500 390.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 410.000 410.000 415.000 415.000 415.000 417.160 419.321 421.481 423.642 425.802 427.963 430.123 432.284 434.444 436.605 438.765 440.926 443.086 445.247 447.407 449.568 451.728 453.889 456.049 458.210 460.370 462.531 464.691 466.852 469.012 471.173 473.333 475.494 477.654 479.815 481.975 484.136 486.296 488.457 490.617 492.778 494.938 497.099 499.259 501.420 503.580 505.741 507.901 510.062 512.222 514.383 516.543 518.704 520.864 523.025 525.185 527.346 529.506 531.667 533.827 535.988 538.148 540.309 542.469 544.630 546.790 548.951 551.111 553.272 555.432 557.593 559.753 561.914 564.074 566.235 568.395 570.556 572.716 574.877 577.037 579.198 581.358 583.519 585.679 587.840 590.000 595.000 597.500 600.000 600.000 610.000 615.000 620.858 627.686 635.746 645.405 657.190 671.892 690.745 715.796 750.705
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 84 81 0 0 72 0 0 0 54 0 0 0 0 66 63 69 69 66 66 63 0 66 69 63 72 75 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 48 42 0 48 48 48 48 54 0 0 0 48 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 -1.171875 -1.171875 1.171875 0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.953125 1.171875 -1.171875 -1.171875 -1.953125 -1.171875 2.734375 1.171875 0.390625 -2.734375 0.390625 -1.953125 -0.390625 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -0.390625 -1.953125 -1.953125 -2.734375 -2.734375 1.953125 -0.390625 -1.953125 2.734375 -2.734375 -2.734375 -2.734375 -1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.497 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 132.19 135.0 140.0 145.0 150.0 154.381 155.0 160.0 165.0 170.0 175.0 176.571 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 474.272 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.552 0.719 0.804 0.83 0.817 0.776 0.703 0.586 0.512 0.512 0.512 0.512 0.512 0.512 0.521 0.593 0.664 0.736 0.807 0.83 0.894 0.985 1.078 1.174 1.276 1.383 1.497 1.618 1.748 1.886 2.034 2.191 2.357 2.533 2.717 2.909 3.109 3.316 3.529 3.747 3.97 4.196 4.426 4.659 4.895 5.132 5.372 5.613 5.855 6.099 6.343 6.588 6.834 7.081 7.328 7.575 7.823 8.07 8.316 8.562 8.807 9.05 9.291 9.53 9.765 9.997 10.223 10.444 10.657 10.862 11.056 11.238 11.406 11.557 11.689 11.801 11.889 11.953 11.99 12.0 12.0 11.993 11.977 11.95 11.915 11.871 11.819 11.759 11.692 11.618 11.537 11.451 11.359 11.262 11.16 11.053 10.943 10.828 10.711 10.59 10.467 10.341 10.213 10.083 9.951 9.818 9.684 9.548 9.412 9.276 9.139 9.002 8.865 8.728 8.591 8.454 8.318 8.183 8.048 7.914 7.781 7.649 7.519 7.389 7.26 7.133 7.007 6.882 6.759 6.637 6.517 6.398 6.281 6.165 6.05 5.938 5.827 5.717 5.609 5.503 5.398 5.295 5.194 5.094 4.996 4.899 4.804 4.711 4.619 4.529 4.44 4.353 4.267 4.183 4.1 4.019 3.939 3.861 3.784 3.709 3.635 3.562 3.491 3.421 3.352 3.285 3.218 3.153 3.09 3.027 2.966 2.906 2.847 2.79 2.733 2.677 2.623 2.57 2.517 2.466 2.416 2.366 2.318 2.271 2.224 2.179

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.83" PeakHeight="110.0" Num="3" Error="0.0">
-25.605 7.076 -0.974
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.83" EndFrequency="12.0" PeakHeight="474.272" Num="5" zHalfNm="373.438" Error="3.598">
-288.327 -19.933 16.032 -8.422 2.949
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="66.571" Depth="0.318"/>
<TopsideChapman PeakHeight="474.272" PeakDensity="1786600.5" PeakScaleHeight="74.678" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
