<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-26 -085 20:50:00.000"
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" >
2026.03.26 (085) 20:50:00</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">
FF202608503262050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.570" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.423" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" 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="0.700" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="520.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.419" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="376.576" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="296.471" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.525" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="114.228" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.825" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="57.459" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="124.790" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.540" 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" >
2.75 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 275.000 265.000 270.000 270.000 270.000 270.000 270.000 270.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 282.500 285.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 295.000 296.667 298.333 300.000 300.000 300.000 302.500 305.000 300.000 300.000 305.000 305.000 305.000 305.000 305.000 310.000 312.500 315.000 310.000 310.000 311.429 312.857 314.286 315.714 317.143 318.571 320.000 325.000 326.667 328.333 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 372.500 375.000 375.000 375.000 380.000 380.000 382.500 385.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 400.000 400.000 405.000 410.000 410.000 410.000 410.000 410.000 415.000 420.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 430.000 430.000 432.500 435.000 440.000 440.000 440.000 442.500 445.000 450.000 450.000 455.000 455.000 460.000 460.000 465.000 470.000 470.000 470.000 475.000 475.000 480.000 485.000 485.000 490.000 495.000 495.000 500.000 505.000 505.000 510.000 515.000 520.000 520.000 520.000 524.981 531.337 539.727 551.318 568.367
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 63 63 0 66 69 72 69 69 69 69 66 48 60 69 69 63 0 66 60 63 0 0 0 0 0 0 0 0 72 69 66 0 69 69 66 63 60 63 66 63 60 0 48 51 57 60 45 48 63 60 57 0 63 63 60 57 0 48 63 57 0 0 0 57 0 0 63 57 0 0 54 57 60 63 57 66 66 66 60 66 66 63 69 54 60 63 66 60 66 69 69 69 0 60 63 66 66 63 66 0 60 66 72 66 69 57 63 69 72 72 72 72 60 69 57 63 69 72 72 66 54 57 63 69 72 66 51 57 66 54 60 63 57 0 66 66 0 66 60 66 66 0 63 60 60 57 60 57 60 54 48 57 57 57 57 57 57 57 57 54 57 57 54 51 54 54 54 51 0 42 0 48 48 0
</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 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -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 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 1.953125 -1.171875 -1.171875 -0.390625 -1.171875 -2.734375 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -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
</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" >
89.973 90.0 95.0 100.0 105.0 110.0 115.0 120.0 121.878 125.0 130.0 133.755 135.0 140.0 145.0 145.633 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 376.576 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.202 0.948 1.229 1.373 1.419 1.393 1.313 1.268 1.268 1.268 1.268 1.284 1.347 1.411 1.419 1.524 1.642 1.762 1.886 2.018 2.159 2.311 2.475 2.654 2.849 3.061 3.289 3.532 3.788 4.054 4.326 4.601 4.878 5.153 5.427 5.698 5.967 6.232 6.494 6.754 7.011 7.267 7.52 7.772 8.023 8.272 8.521 8.769 9.017 9.264 9.51 9.755 9.998 10.238 10.474 10.701 10.916 11.11 11.273 11.39 11.446 11.45 11.446 11.427 11.392 11.343 11.28 11.205 11.119 11.021 10.914 10.798 10.674 10.542 10.404 10.261 10.112 9.958 9.801 9.641 9.477 9.312 9.145 8.976 8.807 8.637 8.467 8.297 8.127 7.958 7.79 7.624 7.458 7.295 7.132 6.972 6.814 6.658 6.504 6.352 6.203 6.056 5.912 5.77 5.63 5.494 5.359 5.228 5.099 4.972 4.849 4.727 4.609 4.493 4.379 4.268 4.159 4.053 3.95 3.848 3.749 3.653 3.558 3.466 3.377 3.289 3.203 3.12 3.038 2.959 2.881 2.806 2.732 2.66 2.591 2.522 2.456 2.391 2.328 2.266 2.206 2.148 2.091 2.036 1.982 1.929 1.878 1.828 1.779 1.732 1.686 1.641 1.597 1.555 1.513 1.473 1.434 1.396 1.358 1.322 1.287 1.252 1.219 1.186 1.155 1.124 1.094 1.064 1.036 1.008 0.981 0.955 0.929 0.905 0.88 0.857 0.834 0.812 0.79 0.769 0.748 0.728 0.709 0.69 0.671 0.653 0.636

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.419" PeakHeight="110.0" Num="3" Error="0.0">
-27.927 9.64 -1.74
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.419" EndFrequency="11.45" PeakHeight="376.576" Num="5" zHalfNm="296.471" Error="4.717">
-205.303 -37.981 20.917 -12.76 4.184
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="35.633" Depth="0.151"/>
<TopsideChapman PeakHeight="376.576" PeakDensity="1626581.9" PeakScaleHeight="57.459" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
