<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-25 -056 08:50:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: 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" >
2026.02.25 (056) 08:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605602250850009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="5.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.315" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.401" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="322.216" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.773" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="280.145" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="225.960" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.973" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="77.229" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.965" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="42.354" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="58.500" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="5.580" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="41">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 240.000 240.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 250.000 250.000 250.000 255.000 255.000 255.000 260.000 260.000 260.000 265.000 270.000 270.000 272.500 275.000 275.000 285.000 285.000 290.000 295.000 297.500 300.000 305.000 310.000 315.000 322.216 331.446 343.671 360.630 385.733 426.703 505.531
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 72 72 63 66 0 72 60 0 0 0 66 63 63 0 63 60 60 66 69 66 69 0 72 69 60 66 63 60 0 66 66 66 66 63 63 60 63 60 57 48
</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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="145">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.602 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 133.552 135.0 140.0 145.0 150.0 155.0 157.104 160.0 165.0 170.0 175.0 180.0 180.656 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 280.145 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.513 0.67 0.748 0.773 0.761 0.724 0.658 0.554 0.439 0.439 0.439 0.439 0.439 0.439 0.439 0.48 0.551 0.622 0.693 0.764 0.773 0.92 1.103 1.304 1.532 1.803 2.138 2.569 3.1 3.623 4.038 4.348 4.583 4.765 4.908 5.02 5.106 5.17 5.215 5.241 5.25 5.25 5.243 5.224 5.192 5.149 5.096 5.033 4.963 4.887 4.803 4.715 4.623 4.526 4.427 4.325 4.222 4.117 4.012 3.906 3.8 3.695 3.59 3.486 3.384 3.283 3.183 3.085 2.989 2.895 2.802 2.712 2.624 2.538 2.455 2.373 2.294 2.217 2.142 2.069 1.998 1.93 1.863 1.799 1.737 1.676 1.618 1.561 1.506 1.454 1.402 1.353 1.305 1.259 1.214 1.171 1.129 1.089 1.05 1.013 0.977 0.942 0.908 0.875 0.844 0.814 0.784 0.756 0.729 0.703 0.678 0.653 0.63 0.607 0.585 0.564 0.544 0.524 0.505 0.487 0.469 0.452 0.436 0.42 0.405 0.39 0.376 0.363 0.35 0.337 0.325 0.313 0.302 0.291 0.28 0.27 0.26 0.251 0.242 0.233 0.225 0.217 0.209 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.773" PeakHeight="110.0" Num="3" Error="0.0">
-25.223 6.705 -0.88
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.773" EndFrequency="5.25" PeakHeight="280.145" Num="5" zHalfNm="225.96" Error="1.461">
-117.699 30.039 -17.056 6.19 -0.963
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="70.656" Depth="0.334"/>
<TopsideChapman PeakHeight="280.145" PeakDensity="341966.5" PeakScaleHeight="42.354" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
