<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 20:30:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.03.27 (086) 20:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608603272030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.594" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.201" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="255.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="255.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="12.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="485.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.794" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="385.014" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="299.643" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.630" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="121.485" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="55.962" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="63.796" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="129.440" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.740" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="200">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 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 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 255.000 256.000 257.000 258.000 259.000 260.000 260.000 265.000 265.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 271.250 272.500 273.750 275.000 280.000 278.750 277.500 276.250 275.000 280.000 281.250 282.500 283.750 285.000 285.000 285.000 285.000 287.500 290.000 290.000 292.500 295.000 290.000 290.000 290.000 292.500 295.000 300.000 300.000 300.000 300.000 301.000 302.000 303.000 304.000 305.000 305.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 321.667 323.333 325.000 325.000 325.000 325.000 330.000 331.667 333.333 335.000 335.000 335.000 335.000 335.000 335.000 337.500 340.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 352.500 355.000 355.000 355.000 355.000 357.500 360.000 361.667 363.333 365.000 365.000 365.000 365.000 365.000 365.000 370.000 371.667 373.333 375.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 376.667 378.333 380.000 381.667 383.333 385.000 385.000 385.000 385.000 385.000 385.000 385.000 386.500 388.000 389.500 391.000 392.500 394.000 395.500 397.000 398.500 400.000 400.000 400.000 400.000 405.000 405.000 405.000 407.500 410.000 410.000 410.000 410.000 415.000 415.000 415.000 417.500 420.000 420.000 420.000 425.000 425.000 426.250 427.500 428.750 430.000 435.000 435.000 435.000 440.000 442.500 445.000 445.000 445.000 445.000 450.000 450.000 455.000 460.000 461.667 463.333 465.000 470.000 470.000 475.000 480.000 480.000 485.000 485.000 500.000 500.000 505.000 510.000 515.000 520.000 526.806 534.642 543.761 554.507 567.359 583.000 602.451 627.297
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 0 60 0 0 60 60 60 0 0 0 66 66 0 0 66 66 0 0 0 60 0 0 0 0 63 66 0 0 0 63 0 63 63 0 63 63 0 0 63 60 51 0 66 63 66 66 69 0 0 0 0 69 66 69 69 60 63 69 0 72 72 69 69 72 0 0 66 69 0 69 66 48 54 60 66 0 54 72 75 45 72 60 63 69 51 72 72 66 66 0 63 0 69 75 60 66 0 51 57 66 0 69 72 75 66 0 0 54 72 72 72 72 72 72 72 0 0 0 0 0 66 69 72 72 72 69 66 0 0 0 0 0 0 0 0 0 57 63 66 69 54 0 63 0 48 57 0 63 48 0 60 0 48 54 60 48 51 0 45 0 57 48 0 57 51 0 45 54 45 57 57 57 57 54 0 0 60 57 57 57 57 57 57 57 42 57 57 57 57 54 51 48 54 54 0 0 45 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.824 90.0 95.0 100.0 105.0 110.0 115.0 119.384 120.0 125.0 128.767 130.0 135.0 138.151 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 385.014 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.215 1.201 1.554 1.736 1.794 1.756 1.657 1.657 1.657 1.657 1.675 1.748 1.794 1.839 1.96 2.081 2.204 2.33 2.461 2.597 2.738 2.887 3.042 3.206 3.378 3.559 3.75 3.951 4.163 4.385 4.619 4.863 5.118 5.383 5.658 5.942 6.234 6.534 6.84 7.151 7.466 7.785 8.107 8.429 8.752 9.074 9.394 9.711 10.024 10.331 10.631 10.921 11.201 11.468 11.718 11.95 12.161 12.347 12.505 12.631 12.724 12.781 12.8 12.8 12.792 12.77 12.734 12.685 12.624 12.551 12.468 12.374 12.272 12.16 12.041 11.915 11.782 11.643 11.499 11.351 11.197 11.041 10.881 10.718 10.553 10.386 10.218 10.048 9.877 9.706 9.535 9.364 9.193 9.022 8.853 8.684 8.516 8.35 8.185 8.021 7.859 7.699 7.541 7.384 7.23 7.078 6.928 6.78 6.634 6.491 6.349 6.211 6.074 5.94 5.808 5.679 5.552 5.427 5.305 5.185 5.067 4.952 4.839 4.728 4.62 4.513 4.409 4.307 4.207 4.11 4.014 3.92 3.829 3.739 3.651 3.566 3.482 3.4 3.32 3.241 3.165 3.09 3.017 2.945 2.875 2.807 2.74 2.675 2.611 2.549 2.488 2.429 2.371 2.314 2.259 2.205 2.152 2.101 2.05 2.001 1.953 1.906 1.861 1.816 1.772 1.73 1.688 1.648 1.608 1.569 1.531 1.495 1.459 1.423 1.389 1.356 1.323 1.291 1.26 1.23 1.2 1.171 1.143 1.115 1.088 1.062 1.036

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.794" PeakHeight="110.0" Num="3" Error="0.0">
-28.724 10.66 -2.112
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.794" EndFrequency="12.8" PeakHeight="385.014" Num="5" zHalfNm="299.643" Error="3.396">
-219.271 -30.575 3.513 -2.068 1.538
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="28.151" Depth="0.137"/>
<TopsideChapman PeakHeight="385.014" PeakDensity="2032754.4" PeakScaleHeight="63.796" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
