<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-26 -085 12:30:00.000"
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" >
2026.03.26 (085) 12:30:00</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">
FF202608503261230009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.659" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.655" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="0.750" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" 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="3.146" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.246" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="333.035" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="236.341" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.211" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="125.996" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.726" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.642" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="155.630" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.390" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="121">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 230.000 230.000 230.000 235.000 240.000 245.000 250.000 255.000 260.000 260.000 265.000 270.000 270.000 275.000 277.500 280.000 282.143 284.286 286.429 288.571 290.714 292.857 295.000 295.000 297.500 300.000 300.000 300.000 300.000 300.000 300.000 302.500 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 317.500 320.000 320.000 325.000 325.000 325.000 330.000 331.667 333.333 335.000 335.000 335.000 335.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 365.000 370.000 375.000 375.000 375.000 380.000 385.000 385.000 390.000 390.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 415.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 455.000 460.000 460.000 460.000 465.000 475.000 475.000 475.000 485.000 485.000 491.143 498.300 506.747 516.865 529.206 544.592 564.309
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 0 45 0 48 0 0 51 54 57 60 57 54 57 0 57 0 57 0 0 48 0 54 54 0 51 51 54 51 0 54 0 57 0 0 0 54 57 60 0 0 51 57 60 63 60 57 0 60 57 57 60 60 57 0 0 57 66 69 69 66 69 57 60 66 60 63 54 60 66 60 63 57 63 57 60 57 63 66 66 57 66 60 66 60 54 66 60 66 60 54 66 63 54 63 57 63 60 60 57 51 51 54 57 54 63 60 54 54 60 60 57 54 51 48 45 0 0 0 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 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 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 -2.734375 1.171875 -1.171875 -0.390625 -2.734375
</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" >
89.521 90.0 95.0 100.0 105.0 110.0 112.574 115.0 115.147 117.721 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 333.035 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.115 2.723 3.044 3.146 3.024 3.024 3.024 3.146 3.222 3.378 3.526 3.673 3.819 3.968 4.119 4.274 4.434 4.599 4.769 4.945 5.126 5.312 5.503 5.697 5.895 6.094 6.296 6.498 6.7 6.901 7.102 7.301 7.498 7.694 7.888 8.08 8.27 8.458 8.644 8.827 9.009 9.188 9.363 9.535 9.701 9.86 10.009 10.144 10.258 10.344 10.392 10.4 10.399 10.39 10.371 10.343 10.306 10.26 10.207 10.146 10.079 10.004 9.924 9.839 9.748 9.652 9.552 9.448 9.341 9.23 9.117 9.0 8.882 8.762 8.639 8.516 8.391 8.265 8.139 8.012 7.885 7.757 7.63 7.502 7.375 7.249 7.123 6.998 6.873 6.749 6.627 6.505 6.385 6.266 6.148 6.031 5.916 5.802 5.689 5.578 5.469 5.361 5.254 5.15 5.046 4.945 4.845 4.746 4.649 4.554 4.461 4.369 4.278 4.189 4.102 4.017 3.932 3.85 3.769 3.689 3.611 3.535 3.46 3.386 3.314 3.243 3.174 3.106 3.039 2.974 2.91 2.847 2.786 2.726 2.667 2.609 2.552 2.497 2.443 2.39 2.338 2.287 2.237 2.188 2.14 2.094 2.048 2.003 1.959 1.916 1.874 1.833 1.793 1.754 1.715 1.677 1.641 1.604 1.569 1.535 1.501 1.468 1.435 1.404 1.373 1.343 1.313 1.284 1.256 1.228 1.201 1.174 1.148 1.123 1.098 1.074 1.05 1.027 1.004 0.982 0.96 0.939 0.918 0.898 0.878 0.859

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.146" PeakHeight="110.0" Num="3" Error="0.0">
-30.315 12.878 -3.042
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.146" EndFrequency="10.4" PeakHeight="333.035" Num="5" zHalfNm="236.341" Error="4.747">
-182.734 -43.196 14.02 -5.775 2.371
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.721" Depth="0.122"/>
<TopsideChapman PeakHeight="333.035" PeakDensity="1341935.5" PeakScaleHeight="69.642" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
