<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-03 -093 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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match</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" >
2026.04.03 (093) 20:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" 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">
FF202609304032030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.586" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.678" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" 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="11.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="455.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.749" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="394.345" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="305.219" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.617" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="126.296" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.952" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="66.143" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="128.380" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.930" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="197">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 275.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 302.500 305.000 305.000 305.000 305.000 307.500 310.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 311.000 312.000 313.000 314.000 315.000 315.000 325.000 325.000 325.000 320.000 320.000 322.500 325.000 327.500 330.000 332.500 335.000 335.000 335.000 336.250 337.500 338.750 340.000 340.000 340.000 341.667 343.333 345.000 345.000 350.000 350.000 350.000 350.000 352.500 355.000 355.000 356.000 357.000 358.000 359.000 360.000 360.000 365.000 365.000 365.000 365.000 365.000 365.000 367.500 370.000 372.500 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 385.000 390.000 392.500 395.000 395.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 402.500 405.000 405.000 405.000 405.000 405.000 415.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 430.000 430.000 430.000 432.500 435.000 437.500 440.000 440.000 441.667 443.333 445.000 447.500 450.000 451.667 453.333 455.000 465.000 475.000 477.500 480.000 485.000 490.000 490.000 490.000 495.000 500.000 507.000 514.000 521.000 528.000 535.000 544.031 553.831 564.502 576.167 588.970 603.087 618.732 636.166
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 60 57 0 60 60 60 60 0 54 69 0 66 66 66 66 66 0 69 69 69 66 66 69 0 66 0 0 63 63 63 0 60 66 63 60 72 69 0 63 0 0 66 0 0 0 69 66 0 0 60 57 51 69 66 66 69 0 0 66 0 60 54 60 0 69 63 57 0 0 0 0 0 60 63 69 0 0 0 66 69 72 0 0 66 69 57 0 63 69 54 57 63 0 0 0 0 66 69 57 60 0 69 57 69 0 69 0 63 0 69 75 69 69 0 72 60 63 69 72 54 69 69 0 57 63 66 69 72 66 69 69 66 72 72 0 69 72 0 0 69 51 0 66 0 66 57 60 63 54 57 63 66 63 60 60 60 60 60 0 57 60 0 57 51 0 54 57 57 51 0 54 42 0 48 0 54 0 42 54 48 54 54 0 0 0 0 51 0 0 0 0 0 0 0 0
</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" >
89.839 90.0 95.0 100.0 105.0 110.0 115.0 119.656 120.0 125.0 129.313 130.0 135.0 138.969 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 394.345 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.214 1.171 1.515 1.693 1.749 1.713 1.611 1.611 1.611 1.611 1.621 1.692 1.749 1.767 1.857 1.948 2.041 2.136 2.235 2.338 2.447 2.56 2.68 2.808 2.943 3.088 3.242 3.408 3.586 3.778 3.983 4.204 4.439 4.69 4.956 5.235 5.525 5.826 6.134 6.447 6.764 7.082 7.4 7.717 8.031 8.342 8.649 8.951 9.248 9.538 9.822 10.098 10.366 10.624 10.87 11.104 11.323 11.526 11.709 11.869 12.005 12.113 12.191 12.237 12.25 12.25 12.241 12.22 12.186 12.141 12.085 12.018 11.942 11.857 11.764 11.663 11.554 11.44 11.319 11.193 11.061 10.926 10.786 10.643 10.497 10.348 10.197 10.044 9.889 9.734 9.577 9.419 9.261 9.103 8.945 8.787 8.63 8.473 8.317 8.163 8.009 7.856 7.705 7.555 7.407 7.26 7.115 6.972 6.831 6.692 6.554 6.419 6.285 6.154 6.024 5.897 5.772 5.649 5.528 5.409 5.292 5.177 5.065 4.954 4.846 4.739 4.635 4.532 4.432 4.334 4.237 4.143 4.05 3.959 3.87 3.783 3.698 3.615 3.533 3.453 3.375 3.298 3.223 3.15 3.078 3.008 2.939 2.872 2.806 2.742 2.679 2.618 2.558 2.499 2.441 2.385 2.33 2.277 2.224 2.173 2.123 2.074 2.026 1.979 1.933 1.888 1.845 1.802 1.76 1.719 1.68 1.641 1.603 1.565 1.529 1.494 1.459 1.425 1.392 1.36 1.328 1.297 1.267 1.237 1.209 1.181 1.153

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.749" PeakHeight="110.0" Num="3" Error="0.0">
-28.643 10.553 -2.071
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.749" EndFrequency="12.25" PeakHeight="394.345" Num="5" zHalfNm="305.219" Error="5.926">
-223.482 -29.13 -0.783 -4.704 2.723
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="28.969" Depth="0.138"/>
<TopsideChapman PeakHeight="394.345" PeakDensity="1861817.6" PeakScaleHeight="66.143" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
