<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-25 -084 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="1 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" >
2026.03.25 (084) 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">
FF202608403251230009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="9.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.664" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.571" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.200" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.260" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="115.094" Name="h`E" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" 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="4.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.245" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="339.809" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="223.332" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.211" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="153.348" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="41.626" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="85.112" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="178.430" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.640" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="95">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 270.000 271.000 272.000 273.000 274.000 275.000 275.000 280.000 280.000 282.500 285.000 287.500 290.000 285.000 285.000 285.000 288.333 291.667 295.000 295.000 295.000 295.000 300.000 300.000 300.000 305.000 305.000 305.000 307.500 310.000 312.500 315.000 317.500 320.000 322.500 325.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 345.000 350.000 350.000 355.000 355.000 360.000 365.000 365.000 370.000 370.000 375.000 380.000 380.000 385.000 390.000 390.000 395.000 395.000 400.000 405.000 405.000 410.000 410.000 415.000 420.000 425.000 430.000 430.000 435.000 440.000 445.000 445.000 445.000 445.000 447.500 450.000 450.000 455.931 462.396 469.469 477.241 485.820 495.339 505.962 517.893 531.388 546.778 564.491 585.096 609.365 638.370
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 48 0 48 0 0 51 45 48 48 45 54 0 0 48 54 48 0 0 60 60 63 57 66 63 57 60 54 51 0 0 0 0 0 0 0 60 51 57 54 60 63 63 66 63 54 60 57 63 60 54 60 57 60 60 54 57 57 54 63 60 63 66 63 63 66 66 63 66 63 60 63 60 57 51 60 57 63 63 60 0 51 54 60 57 60 0 0 0 0 0 0 45 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 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.171875 -1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 1.953125 -1.953125 -2.734375 -0.390625 -0.390625 -1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="2">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.2 3.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.094 120.807
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -1.953125
</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" >
89.503 90.0 95.0 100.0 105.0 110.0 112.575 115.0 115.151 117.726 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 339.809 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.193 2.821 3.154 3.26 3.134 3.134 3.134 3.26 3.335 3.492 3.644 3.794 3.944 4.096 4.251 4.409 4.57 4.735 4.903 5.075 5.249 5.425 5.603 5.782 5.962 6.141 6.319 6.497 6.672 6.846 7.018 7.187 7.353 7.517 7.678 7.836 7.991 8.143 8.291 8.435 8.576 8.711 8.841 8.965 9.083 9.192 9.292 9.381 9.457 9.518 9.564 9.591 9.6 9.6 9.597 9.587 9.571 9.55 9.523 9.491 9.454 9.412 9.366 9.315 9.26 9.202 9.14 9.074 9.005 8.934 8.86 8.783 8.703 8.622 8.539 8.453 8.366 8.278 8.188 8.097 8.005 7.912 7.819 7.724 7.629 7.534 7.438 7.342 7.246 7.149 7.053 6.957 6.861 6.765 6.67 6.575 6.48 6.386 6.292 6.199 6.106 6.014 5.923 5.833 5.743 5.654 5.566 5.479 5.393 5.307 5.223 5.139 5.057 4.975 4.894 4.814 4.736 4.658 4.581 4.505 4.43 4.356 4.283 4.211 4.14 4.071 4.002 3.934 3.867 3.801 3.736 3.672 3.609 3.546 3.485 3.425 3.366 3.307 3.25 3.193 3.138 3.083 3.029 2.976 2.924 2.872 2.822 2.772 2.723 2.675 2.628 2.581 2.536 2.491 2.446 2.403 2.36 2.318 2.277 2.236 2.197 2.157 2.119 2.081 2.044 2.007 1.971 1.936 1.901 1.867 1.834 1.801 1.768 1.737 1.705 1.675 1.645 1.615 1.586 1.557 1.529 1.502 1.475 1.448 1.422 1.396

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.26" PeakHeight="110.0" Num="3" Error="0.0">
-30.404 13.009 -3.102
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.26" EndFrequency="9.6" PeakHeight="339.809" Num="5" zHalfNm="223.332" Error="3.705">
-204.302 -24.952 9.447 -3.809 1.533
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.726" Depth="0.126"/>
<TopsideChapman PeakHeight="339.809" PeakDensity="1143424.4" PeakScaleHeight="85.112" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
