<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 18:10:00.000"
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: 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" >
2026.03.01 (060) 18:10:00</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">
FF202606003011810009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.439" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.370" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.750" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="505.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.038" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.193" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="402.220" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="287.755" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.433" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="154.815" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="70.400" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="84.048" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="186.480" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.400" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="161">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 245.000 245.000 250.000 250.000 255.000 260.000 265.000 265.000 265.000 270.000 270.000 275.000 280.000 280.000 285.000 285.000 290.000 290.000 293.333 296.667 300.000 300.000 300.000 300.000 305.000 307.500 310.000 310.000 310.000 313.333 316.667 320.000 320.000 320.000 325.000 325.000 325.000 330.000 331.667 333.333 335.000 340.000 340.000 340.000 345.000 347.500 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 377.500 380.000 380.000 380.000 380.000 385.000 385.000 387.500 390.000 390.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 420.000 422.500 425.000 427.500 430.000 430.000 432.500 435.000 435.000 440.000 440.000 440.000 445.000 445.000 445.000 450.000 450.000 452.000 454.000 456.000 458.000 460.000 455.000 460.000 460.000 460.000 460.000 465.000 465.000 466.667 468.333 470.000 475.000 472.500 470.000 475.000 480.000 475.000 480.000 485.000 490.000 492.500 495.000 495.000 497.500 500.000 505.000 505.000 510.000 515.000 505.000 512.500 520.000 520.000 530.000 535.000 537.500 540.000 547.500 555.000 560.000 567.500 575.000 580.000 585.000 594.049 603.941 614.801 626.778 640.054 654.852 671.449 690.195
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 54 51 54 0 0 45 54 54 54 51 0 48 54 51 54 51 54 0 0 48 57 60 57 60 51 57 60 60 0 0 51 57 57 54 57 57 57 0 0 60 51 57 63 54 0 51 57 60 63 57 60 60 0 48 63 63 63 60 63 63 60 0 57 63 63 66 66 66 0 63 66 63 66 57 63 69 60 63 66 63 63 57 63 66 60 63 66 0 66 54 63 66 57 63 63 57 60 63 57 60 63 57 60 0 0 0 0 45 60 57 60 60 60 57 60 0 0 57 48 0 57 0 54 57 51 57 48 0 48 54 0 51 51 51 0 45 0 0 48 42 51 51 0 51 0 51 51 0 45 51 48 48 48 48 0 45 0 42 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
89.539 90.0 95.0 100.0 105.0 110.0 113.046 115.0 116.091 119.137 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 402.22 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.042 2.63 2.939 3.038 2.916 2.916 2.916 3.038 3.061 3.193 3.328 3.465 3.604 3.747 3.893 4.041 4.193 4.347 4.505 4.665 4.828 4.993 5.161 5.332 5.505 5.68 5.857 6.036 6.217 6.4 6.584 6.77 6.958 7.146 7.336 7.527 7.72 7.913 8.107 8.302 8.498 8.695 8.892 9.09 9.288 9.487 9.685 9.884 10.082 10.279 10.476 10.67 10.863 11.052 11.238 11.418 11.592 11.757 11.911 12.052 12.176 12.281 12.363 12.419 12.447 12.45 12.449 12.44 12.423 12.398 12.366 12.326 12.28 12.228 12.169 12.105 12.035 11.959 11.879 11.795 11.706 11.613 11.516 11.416 11.313 11.207 11.098 10.986 10.873 10.757 10.639 10.52 10.399 10.278 10.155 10.031 9.906 9.781 9.655 9.529 9.402 9.276 9.149 9.023 8.897 8.771 8.646 8.521 8.397 8.273 8.15 8.028 7.906 7.786 7.666 7.548 7.43 7.314 7.198 7.084 6.971 6.859 6.748 6.639 6.53 6.423 6.318 6.213 6.11 6.008 5.908 5.808 5.711 5.614 5.519 5.425 5.332 5.241 5.151 5.062 4.975 4.889 4.804 4.721 4.638 4.557 4.478 4.399 4.322 4.246 4.171 4.098 4.025 3.954 3.884 3.815 3.747 3.68 3.615 3.55 3.487 3.425 3.363 3.303 3.244 3.185 3.128 3.072 3.017 2.962 2.909 2.856 2.805 2.754 2.704 2.655 2.607 2.56 2.513 2.468 2.423 2.379 2.336 2.293 2.252 2.211

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.038" PeakHeight="110.0" Num="3" Error="0.0">
-30.227 12.749 -2.983
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.038" EndFrequency="12.45" PeakHeight="402.22" Num="5" zHalfNm="287.755" Error="3.425">
-244.645 -51.474 16.423 -4.133 0.746
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.137" Depth="0.122"/>
<TopsideChapman PeakHeight="402.22" PeakDensity="1923108.0" PeakScaleHeight="84.048" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
