<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-26 -085 09:10:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</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) 09:10:00</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">
FF202608503260910009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.230" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.124" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.250" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="325.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.308" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="276.434" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="221.231" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.530" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="77.616" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.457" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="41.675" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="82.540" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.870" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="60">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 260.000 260.000 261.250 262.500 263.750 265.000 265.000 265.000 265.000 265.000 266.000 267.000 268.000 269.000 270.000 270.000 275.000 275.000 275.000 275.000 276.667 278.333 280.000 280.000 280.000 280.000 285.000 285.000 286.667 288.333 290.000 290.000 290.000 290.000 290.000 295.000 297.500 300.000 300.000 305.000 305.000 305.000 310.000 315.000 315.000 320.000 325.000 325.000 325.000 335.000 335.000 340.000 345.158 351.740 360.431 372.436 390.099 418.650 472.648
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 54 0 0 0 66 0 66 66 66 0 57 48 0 60 66 54 0 69 72 0 0 63 0 57 63 60 57 0 0 63 60 66 0 0 63 0 63 66 66 60 63 0 63 54 51 60 69 63 66 66 63 72 66 57 66 60 48 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 0.390625 0.390625 2.734375 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.953125 -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 1.171875 0.390625 0.390625 0.390625 0.390625 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 1.953125 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="149">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.033 95.0 100.0 105.0 110.0 115.0 120.0 122.807 125.0 130.0 135.0 135.613 140.0 145.0 148.42 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 276.434 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.873 1.133 1.266 1.308 1.285 1.214 1.15 1.15 1.15 1.15 1.15 1.204 1.266 1.308 1.358 1.532 1.729 1.942 2.166 2.397 2.635 2.88 3.132 3.39 3.656 3.928 4.206 4.489 4.774 5.057 5.337 5.606 5.862 6.097 6.307 6.487 6.634 6.745 6.816 6.848 6.85 6.845 6.823 6.784 6.73 6.662 6.582 6.49 6.39 6.28 6.164 6.042 5.914 5.783 5.648 5.511 5.372 5.232 5.092 4.952 4.812 4.673 4.536 4.4 4.266 4.134 4.005 3.878 3.753 3.632 3.513 3.397 3.283 3.173 3.066 2.962 2.86 2.762 2.666 2.574 2.484 2.397 2.313 2.231 2.152 2.076 2.002 1.931 1.862 1.795 1.73 1.668 1.608 1.55 1.494 1.44 1.388 1.338 1.289 1.242 1.197 1.153 1.111 1.071 1.032 0.994 0.958 0.923 0.889 0.857 0.825 0.795 0.766 0.738 0.711 0.685 0.66 0.635 0.612 0.59 0.568 0.547 0.527 0.508 0.489 0.471 0.454 0.437 0.421 0.406 0.391 0.376 0.362 0.349 0.336 0.324 0.312 0.301 0.29 0.279 0.269 0.259 0.249 0.24 0.231 0.223 0.215 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.308" PeakHeight="110.0" Num="3" Error="0.0">
-27.619 9.268 -1.616
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.308" EndFrequency="6.85" PeakHeight="276.434" Num="5" zHalfNm="221.231" Error="1.649">
-124.106 -5.34 1.494 0.444 -0.506
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="38.42" Depth="0.158"/>
<TopsideChapman PeakHeight="276.434" PeakDensity="582165.0" PeakScaleHeight="41.675" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
