<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-09 -099 19:40:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: Moderate F-spread, F2o cusp not found, F2 cusps do not match</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" >
2026.04.09 (099) 19:40:00</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">
FF202609904091940009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="23" >
<URSI ID="00" Val="6.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="1.723" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="10.939" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="895.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="895.000" 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="88" Val="6.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="910.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.361" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="571.327" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="332.622" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.964" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="280.938" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="34.441" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="157.464" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="419.860" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.050" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="17">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
940.000 936.667 933.333 930.000 924.167 918.333 912.500 906.667 900.833 895.000 902.500 910.000 945.000 980.000 990.000 1000.000 1005.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 9 0 0 0 9 0 0 0 0 0 12 0 0 12
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 0.390625 -1.953125 -2.734375 0.390625 0.390625 0.390625 2.734375 -1.953125 2.734375 0.390625 1.953125 0.390625 1.171875 0.390625 1.171875 -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" >
89.67 90.0 95.0 100.0 105.0 110.0 115.0 116.284 120.0 122.569 125.0 128.853 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 571.327 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.228 1.584 2.044 2.285 2.361 2.282 2.235 2.235 2.235 2.284 2.361 2.372 2.421 2.47 2.52 2.569 2.62 2.671 2.723 2.776 2.83 2.884 2.939 2.995 3.052 3.109 3.167 3.225 3.283 3.341 3.399 3.456 3.514 3.57 3.626 3.682 3.736 3.79 3.844 3.896 3.948 3.998 4.048 4.098 4.146 4.194 4.241 4.288 4.333 4.379 4.423 4.467 4.511 4.554 4.596 4.638 4.68 4.721 4.762 4.803 4.843 4.883 4.923 4.962 5.001 5.04 5.079 5.117 5.156 5.194 5.232 5.27 5.308 5.346 5.384 5.422 5.46 5.498 5.536 5.574 5.612 5.65 5.689 5.728 5.767 5.806 5.845 5.885 5.925 5.966 6.007 6.049 6.091 6.134 6.177 6.22 6.262 6.301 6.332 6.349 6.35 6.35 6.348 6.345 6.341 6.336 6.33 6.323 6.315 6.305 6.295 6.283 6.271 6.257 6.243 6.228 6.212 6.195 6.177 6.158 6.139 6.119 6.098 6.076 6.054 6.031 6.008 5.984 5.959 5.934 5.908 5.881 5.854 5.827 5.799 5.771 5.742 5.713 5.684 5.654 5.623 5.593 5.562 5.531 5.499 5.467 5.435 5.403 5.37 5.338 5.305 5.272 5.238 5.205 5.171 5.138 5.104 5.07 5.036 5.002 4.967 4.933 4.899 4.865 4.83 4.796 4.761 4.727 4.692 4.658 4.624 4.589 4.555 4.521 4.486 4.452 4.418 4.384 4.35 4.316 4.282 4.249 4.215 4.182 4.148 4.115 4.082

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.361" PeakHeight="110.0" Num="3" Error="0.0">
-29.554 11.786 -2.562
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.361" EndFrequency="6.35" PeakHeight="571.327" Num="5" zHalfNm="332.622" Error="13.484">
-359.934 -133.738 75.284 -29.916 5.83
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="18.853" Depth="0.126"/>
<TopsideChapman PeakHeight="571.327" PeakDensity="500279.16" PeakScaleHeight="157.464" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
