<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-24 -083 20:10:00.000"
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" >
2026.03.24 (083) 20:10:00</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">
FF202608303242010009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.586" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.128" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="490.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.102" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="368.613" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="284.648" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.686" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="116.172" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.592" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="60.230" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="133.270" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.430" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="175">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 245.000 245.000 250.000 250.000 250.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 260.000 262.500 265.000 265.000 265.000 270.000 270.000 270.000 270.000 270.000 271.667 273.333 275.000 275.000 275.000 276.250 277.500 278.750 280.000 285.000 285.000 280.000 282.500 285.000 290.000 290.000 290.000 295.000 290.000 290.000 293.333 296.667 300.000 305.000 305.000 305.000 306.250 307.500 308.750 310.000 310.000 315.000 315.000 315.000 315.000 315.000 318.333 321.667 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 331.250 332.500 333.750 335.000 340.000 341.250 342.500 343.750 345.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 387.500 390.000 390.000 392.500 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 405.000 407.500 410.000 410.000 415.000 415.000 415.000 415.000 417.500 420.000 420.000 422.500 425.000 425.000 427.500 430.000 435.000 435.000 435.000 435.000 440.000 435.000 440.000 445.000 450.000 450.000 450.000 455.000 455.000 455.000 465.000 465.000 470.000 470.000 475.000 480.000 482.500 485.000 490.000 490.000 500.000 500.000 505.000 508.493 512.445 516.951 522.138 528.171 535.278 543.772 554.102 566.939
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 57 63 54 0 63 66 69 66 63 66 66 63 60 57 51 60 0 0 0 54 0 0 60 63 66 0 0 66 0 63 0 0 0 63 0 63 51 0 63 63 63 63 60 57 48 0 0 63 51 57 60 0 0 0 63 66 54 60 0 66 66 0 0 51 57 0 63 54 0 63 69 0 63 45 69 60 0 48 54 60 66 69 57 63 69 69 63 66 69 63 66 69 63 69 60 66 69 60 66 72 72 75 72 72 66 69 72 60 66 69 54 63 69 0 66 69 69 69 57 66 69 72 0 63 69 60 0 66 69 60 66 66 57 63 66 0 60 51 57 60 63 60 60 54 57 54 54 54 54 54 54 48 51 51 54 54 51 0 51 51 48 48 51 51 51 0 51 48 48 51 48 51 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625
</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" >
89.732 90.0 95.0 100.0 105.0 110.0 115.0 117.652 120.0 125.0 125.304 130.0 132.956 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 368.613 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.223 1.409 1.82 2.034 2.102 2.047 1.972 1.972 1.972 1.972 2.052 2.102 2.149 2.265 2.382 2.503 2.627 2.757 2.894 3.038 3.191 3.353 3.525 3.708 3.903 4.108 4.323 4.548 4.782 5.023 5.268 5.518 5.77 6.022 6.275 6.528 6.779 7.029 7.277 7.524 7.769 8.012 8.255 8.496 8.736 8.975 9.213 9.451 9.687 9.922 10.156 10.387 10.614 10.836 11.048 11.244 11.416 11.55 11.632 11.65 11.649 11.637 11.611 11.571 11.517 11.452 11.375 11.288 11.191 11.086 10.972 10.851 10.723 10.589 10.449 10.305 10.157 10.005 9.85 9.692 9.532 9.37 9.207 9.043 8.878 8.713 8.548 8.383 8.219 8.055 7.893 7.731 7.571 7.412 7.255 7.099 6.945 6.794 6.644 6.496 6.351 6.207 6.066 5.928 5.791 5.658 5.526 5.397 5.27 5.146 5.024 4.904 4.787 4.672 4.56 4.45 4.342 4.237 4.134 4.033 3.934 3.838 3.743 3.651 3.561 3.473 3.387 3.303 3.221 3.14 3.062 2.986 2.911 2.838 2.767 2.698 2.63 2.564 2.499 2.436 2.375 2.315 2.257 2.2 2.144 2.09 2.037 1.985 1.935 1.886 1.838 1.791 1.746 1.702 1.658 1.616 1.575 1.535 1.496 1.458 1.421 1.384 1.349 1.315 1.281 1.249 1.217 1.186 1.156 1.126 1.097 1.069 1.042 1.015 0.989 0.964 0.94 0.916 0.892 0.869 0.847 0.825 0.804 0.784 0.764 0.744 0.725

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.102" PeakHeight="110.0" Num="3" Error="0.0">
-29.218 11.32 -2.37
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.102" EndFrequency="11.65" PeakHeight="368.613" Num="5" zHalfNm="284.648" Error="3.964">
-198.025 -48.175 17.489 -10.133 3.187
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="22.956" Depth="0.13"/>
<TopsideChapman PeakHeight="368.613" PeakDensity="1683902.0" PeakScaleHeight="60.23" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
