<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-08 -098 08:30:00.000"
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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Unidentified traces above foF2</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" >
2026.04.08 (098) 08:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" 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">
FF202609804080830009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="6.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.136" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="13.460" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="605.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="605.000" 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="84" Val="691.250" Name="QF" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="656.150" 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="0.580" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="525.688" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="401.015" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.756" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="179.642" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="19.500" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="93.138" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="181.860" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.960" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="25">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
605.000 606.250 607.500 608.750 610.000 611.667 613.333 615.182 617.236 619.530 622.110 625.034 628.374 632.226 636.717 642.022 648.383 656.150 665.848 678.299 694.869 718.008 752.587 809.875 923.180
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
12 0 0 0 12 0 0 12 0 0 0 12 0 0 0 0 0 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 -1.171875 0.390625 -1.953125 0.390625 2.734375 0.390625 -2.734375 0.390625 0.390625 0.390625 -1.171875 -2.734375 0.390625 0.390625 0.390625 2.734375 -2.734375 0.390625 -1.953125 0.390625 1.171875 0.390625 2.734375 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.188 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.82 140.0 145.0 150.0 155.0 160.0 163.639 165.0 170.0 175.0 180.0 185.0 190.0 190.459 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 525.688 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.384 0.503 0.562 0.58 0.572 0.547 0.504 0.435 0.325 0.264 0.264 0.264 0.264 0.264 0.264 0.264 0.28 0.339 0.398 0.457 0.516 0.575 0.58 0.619 0.663 0.709 0.758 0.808 0.861 0.916 0.974 1.035 1.1 1.167 1.238 1.313 1.39 1.472 1.556 1.644 1.735 1.829 1.926 2.025 2.127 2.232 2.339 2.447 2.558 2.67 2.783 2.898 3.014 3.131 3.248 3.366 3.485 3.604 3.723 3.842 3.961 4.079 4.197 4.315 4.431 4.547 4.661 4.774 4.885 4.994 5.102 5.206 5.308 5.407 5.503 5.595 5.683 5.766 5.845 5.919 5.987 6.049 6.105 6.155 6.198 6.233 6.261 6.282 6.295 6.3 6.3 6.299 6.294 6.286 6.275 6.26 6.243 6.223 6.2 6.175 6.147 6.117 6.084 6.05 6.013 5.975 5.935 5.893 5.849 5.804 5.758 5.71 5.661 5.612 5.561 5.509 5.456 5.403 5.348 5.294 5.238 5.182 5.126 5.07 5.013 4.955 4.898 4.84 4.783 4.725 4.667 4.609 4.552 4.494 4.437 4.38 4.322 4.266 4.209 4.153 4.097 4.041 3.986 3.931 3.876 3.822 3.768 3.715 3.662 3.61 3.558 3.507 3.456 3.405 3.355 3.306 3.257 3.209 3.161 3.113 3.067 3.02 2.975 2.929 2.885 2.841 2.797 2.754 2.712 2.67 2.629 2.588 2.548 2.508 2.469 2.43 2.392 2.354 2.317 2.281 2.244 2.209 2.174 2.139 2.105 2.072

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.58" PeakHeight="110.0" Num="3" Error="0.0">
-23.434 5.167 -0.545
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.58" EndFrequency="6.3" PeakHeight="525.688" Num="5" zHalfNm="401.015" Error="3.36">
-329.568 -9.284 6.148 -3.915 1.39
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="80.459" Depth="0.316"/>
<TopsideChapman PeakHeight="525.688" PeakDensity="492431.75" PeakScaleHeight="93.138" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
