<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-24 -055 17:10:00.000"
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 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" >
2026.02.24 (055) 17:10:00</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">
FF202605502241710009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.488" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.876" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.246" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.293" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="360.100" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="242.918" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.179" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="150.084" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.913" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="83.381" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="190.810" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.340" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="96">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 305.000 306.667 308.333 310.000 315.000 316.250 317.500 318.750 320.000 320.000 322.500 325.000 325.000 326.667 328.333 330.000 335.000 336.000 337.000 338.000 339.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 358.333 361.667 365.000 365.000 365.000 367.500 370.000 372.500 375.000 380.000 380.000 385.000 385.000 387.500 390.000 395.000 395.000 397.500 400.000 405.000 405.000 410.000 412.500 415.000 420.000 420.000 425.000 425.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 455.000 455.000 460.000 465.000 475.000 475.000 475.000 485.000 490.000 490.000 500.000 500.000 505.000 510.000 515.000 520.000 525.000 535.000 540.000 545.000 551.264 558.162 565.794 574.286 583.790 594.499 606.658 620.582
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 57 51 0 0 51 51 0 0 0 54 51 0 51 54 0 0 48 0 0 54 0 0 51 54 57 60 60 63 60 60 60 60 0 0 57 0 60 0 60 0 60 57 60 57 63 0 63 54 63 54 63 60 54 60 0 63 48 63 63 63 66 60 66 66 60 60 60 60 57 57 57 54 60 60 57 57 57 57 57 54 54 51 51 51 51 54 51 51 51 45 48 48 51 48 45
</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 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
</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" >
89.506 90.0 95.0 100.0 105.0 110.0 112.148 114.296 115.0 116.444 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 360.1 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.183 2.809 3.14 3.246 3.124 3.124 3.164 3.246 3.374 3.53 3.673 3.811 3.947 4.082 4.218 4.356 4.496 4.638 4.783 4.931 5.082 5.235 5.391 5.548 5.707 5.867 6.027 6.188 6.348 6.508 6.666 6.824 6.98 7.135 7.289 7.441 7.592 7.741 7.888 8.034 8.179 8.323 8.465 8.606 8.745 8.883 9.02 9.154 9.286 9.415 9.538 9.656 9.764 9.858 9.933 9.982 10.0 10.0 9.997 9.987 9.97 9.947 9.918 9.884 9.844 9.799 9.749 9.695 9.636 9.573 9.506 9.436 9.362 9.285 9.205 9.123 9.038 8.951 8.861 8.77 8.677 8.582 8.486 8.389 8.29 8.191 8.091 7.99 7.889 7.787 7.685 7.583 7.481 7.378 7.276 7.174 7.072 6.97 6.869 6.768 6.668 6.568 6.469 6.371 6.273 6.176 6.08 5.985 5.89 5.796 5.704 5.612 5.521 5.431 5.343 5.255 5.168 5.082 4.998 4.914 4.832 4.75 4.67 4.591 4.512 4.435 4.359 4.284 4.21 4.137 4.066 3.995 3.925 3.857 3.789 3.723 3.657 3.593 3.529 3.467 3.405 3.345 3.285 3.227 3.169 3.112 3.057 3.002 2.948 2.895 2.843 2.792 2.741 2.692 2.643 2.596 2.549 2.502 2.457 2.412 2.369 2.325 2.283 2.242 2.201 2.161 2.121 2.082 2.044 2.007 1.97 1.934 1.899 1.864 1.83 1.796 1.763 1.731 1.699 1.668 1.637 1.607 1.578 1.549 1.52 1.492

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.246" PeakHeight="110.0" Num="3" Error="0.0">
-30.393 12.993 -3.094
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.246" EndFrequency="10.0" PeakHeight="360.1" Num="5" zHalfNm="242.918" Error="5.241">
-209.328 -50.625 20.549 -7.287 3.035
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.444" Depth="0.122"/>
<TopsideChapman PeakHeight="360.1" PeakDensity="1240694.8" PeakScaleHeight="83.381" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
