<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-24 -055 11:10:00.000"
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: 100%</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) 11:10:00</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">
FF202605502241110009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.717" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.810" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" 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="8.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.716" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="331.631" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="229.976" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.047" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="137.351" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="36.026" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="75.071" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="153.120" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.740" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="112">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 230.000 231.667 233.333 235.000 236.667 238.333 240.000 242.000 244.000 246.000 248.000 250.000 250.000 253.750 257.500 261.250 265.000 265.000 267.500 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 280.000 282.500 285.000 285.000 285.000 285.000 287.500 290.000 292.500 295.000 295.000 295.000 295.000 295.000 295.000 300.000 300.000 305.000 310.000 310.000 310.000 310.000 315.000 315.000 317.500 320.000 322.500 325.000 327.500 330.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 355.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 405.000 410.000 415.000 415.000 420.000 425.000 430.000 430.000 435.000 435.000 445.000 445.000 450.000 455.000 460.000 465.845 472.729 480.957 490.964 503.399 519.266 540.213 569.146 611.707
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 0 0 0 0 0 57 0 0 0 0 54 51 48 0 0 57 66 54 60 66 0 66 60 63 63 60 54 0 0 0 0 0 0 0 0 0 60 48 0 0 0 45 0 60 0 51 0 0 57 66 69 0 0 0 0 0 57 63 51 60 66 54 63 69 60 66 57 66 57 66 60 69 63 66 63 69 69 63 72 69 72 72 69 69 72 69 72 72 66 69 69 66 66 69 69 69 69 66 66 66 69 69 66 66 63 63 60 57 48 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 0.390625 -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 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 -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
</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" >
89.596 90.0 95.0 100.0 105.0 110.0 114.528 115.0 119.055 120.0 123.583 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 331.631 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.233 1.825 2.351 2.628 2.716 2.593 2.593 2.593 2.619 2.716 2.761 2.917 3.073 3.231 3.393 3.559 3.73 3.907 4.089 4.276 4.468 4.664 4.864 5.068 5.273 5.48 5.688 5.896 6.104 6.311 6.516 6.718 6.919 7.117 7.312 7.503 7.69 7.874 8.052 8.225 8.393 8.553 8.706 8.85 8.983 9.105 9.214 9.307 9.384 9.443 9.481 9.499 9.5 9.498 9.489 9.472 9.447 9.416 9.378 9.334 9.284 9.228 9.168 9.102 9.032 8.957 8.879 8.797 8.712 8.623 8.532 8.439 8.343 8.244 8.145 8.043 7.94 7.836 7.731 7.625 7.518 7.411 7.303 7.195 7.087 6.979 6.871 6.763 6.656 6.549 6.443 6.337 6.232 6.127 6.024 5.921 5.819 5.718 5.618 5.519 5.421 5.324 5.229 5.134 5.041 4.949 4.858 4.768 4.68 4.593 4.507 4.422 4.339 4.257 4.176 4.096 4.018 3.941 3.865 3.79 3.717 3.645 3.574 3.504 3.436 3.368 3.302 3.237 3.173 3.111 3.049 2.989 2.93 2.871 2.814 2.758 2.703 2.649 2.596 2.544 2.493 2.443 2.394 2.346 2.298 2.252 2.207 2.162 2.118 2.076 2.034 1.992 1.952 1.912 1.874 1.835 1.798 1.762 1.726 1.691 1.656 1.623 1.589 1.557 1.525 1.494 1.464 1.434 1.404 1.376 1.348 1.32 1.293 1.267 1.241 1.215 1.19 1.166 1.142 1.119 1.096 1.073 1.051 1.03 1.009 0.988 0.968

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.716" PeakHeight="110.0" Num="3" Error="0.0">
-29.937 12.328 -2.795
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.716" EndFrequency="9.5" PeakHeight="331.631" Num="5" zHalfNm="229.976" Error="1.865">
-194.549 -18.053 6.303 -2.718 0.969
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="13.583" Depth="0.123"/>
<TopsideChapman PeakHeight="331.631" PeakDensity="1119727.0" PeakScaleHeight="75.071" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
