<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-25 -056 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: 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" >
2026.02.25 (056) 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">
FF202605602251810009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.422" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.829" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.350" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="115.000" Name="h`Es" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="555.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.040" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.193" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="379.081" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="266.644" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.513" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.300" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="144.367" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.764" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="79.882" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="189.300" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.230" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="114">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 265.000 265.000 266.667 268.333 270.000 275.000 279.000 283.000 287.000 291.000 295.000 299.000 303.000 307.000 311.000 315.000 320.000 325.000 330.000 335.000 340.000 345.000 345.000 350.000 350.000 350.000 355.000 356.667 358.333 360.000 360.000 363.000 366.000 369.000 372.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 378.333 381.667 385.000 388.333 391.667 395.000 395.000 395.000 395.000 395.000 395.000 400.000 402.500 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 460.000 465.000 470.000 475.000 475.000 480.000 485.000 485.000 490.000 495.000 495.000 500.000 500.000 505.000 510.000 510.000 515.000 520.000 525.000 525.000 530.000 530.000 535.000 540.000 545.000 550.000 555.000 555.000 565.000 570.000 575.000 585.000 590.000 599.984 611.744 625.799
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 54 0 0 0 45 0 0 0 0 0 0 0 45 0 54 63 0 51 0 0 48 60 54 0 63 63 0 0 63 57 0 0 0 0 0 0 0 0 63 0 66 66 0 0 0 0 0 48 51 60 63 60 60 60 0 60 63 57 63 57 63 54 63 57 66 60 66 63 66 63 60 66 63 60 63 60 60 60 60 54 60 60 54 57 57 51 57 57 57 57 54 57 57 57 51 57 54 54 57 57 57 54 54 51 51 54 54 48 51 45 0 0
</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 -1.953125 -0.390625 -1.953125 2.734375 -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 -0.390625 -0.390625 1.953125 -1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="22">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.000 107.500 110.000 110.000 110.000 110.000 105.000 109.000 113.000 117.000 121.000 125.000 120.000 120.000 120.000 120.000 120.000 118.750 117.500 116.250 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 48 51 0 0 54 63 0 0 0 0 48 51 54 51 54 51 0 0 0 48 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 -0.390625 -2.734375 -0.390625 0.390625 -0.390625 0.390625 0.390625 1.171875 -2.734375 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" >
89.539 90.0 95.0 100.0 105.0 110.0 113.041 115.0 116.082 119.123 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 379.081 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.044 2.631 2.941 3.04 2.918 2.918 2.918 3.04 3.063 3.194 3.322 3.449 3.576 3.704 3.834 3.965 4.098 4.234 4.371 4.511 4.653 4.796 4.942 5.089 5.237 5.386 5.536 5.687 5.838 5.99 6.141 6.293 6.444 6.596 6.747 6.898 7.048 7.198 7.348 7.498 7.648 7.797 7.946 8.096 8.245 8.394 8.543 8.692 8.841 8.99 9.139 9.286 9.433 9.578 9.719 9.854 9.981 10.092 10.18 10.235 10.25 10.25 10.245 10.232 10.212 10.185 10.152 10.112 10.067 10.016 9.96 9.898 9.833 9.762 9.688 9.61 9.528 9.443 9.355 9.264 9.17 9.074 8.977 8.877 8.775 8.672 8.568 8.462 8.356 8.248 8.14 8.031 7.922 7.813 7.704 7.594 7.485 7.375 7.266 7.157 7.049 6.941 6.834 6.727 6.621 6.516 6.412 6.308 6.205 6.104 6.003 5.903 5.804 5.707 5.61 5.515 5.42 5.327 5.235 5.144 5.054 4.966 4.879 4.793 4.708 4.624 4.541 4.46 4.38 4.301 4.223 4.147 4.072 3.997 3.925 3.853 3.782 3.713 3.644 3.577 3.511 3.446 3.382 3.319 3.257 3.197 3.137 3.078 3.021 2.964 2.908 2.854 2.8 2.747 2.695 2.644 2.595 2.545 2.497 2.45 2.403 2.358 2.313 2.269 2.226 2.184 2.142 2.101 2.061 2.022 1.983 1.945 1.908 1.872 1.836 1.801 1.766 1.732 1.699 1.666 1.634 1.603 1.572 1.542 1.512 1.483

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.04" PeakHeight="110.0" Num="3" Error="0.0">
-30.228 12.751 -2.984
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.04" EndFrequency="10.25" PeakHeight="379.081" Num="5" zHalfNm="266.644" Error="4.524">
-214.923 -63.44 24.009 -7.567 1.963
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.123" Depth="0.122"/>
<TopsideChapman PeakHeight="379.081" PeakDensity="1303505.0" PeakScaleHeight="79.882" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
