<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-19 -078 15:50:00.000"
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" >
2026.03.19 (078) 15:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607803191550009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.444" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.610" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="8.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="505.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.386" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.358" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="370.180" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="236.104" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.612" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="172.012" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.174" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="97.009" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="211.330" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.500" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="89">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 285.000 291.667 298.333 305.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 320.000 320.000 325.000 327.500 330.000 330.000 335.000 340.000 340.000 340.000 340.000 345.000 345.000 347.500 350.000 355.000 355.000 355.000 360.000 360.000 363.333 366.667 370.000 370.000 372.500 375.000 377.500 380.000 380.000 383.750 387.500 391.250 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 425.000 430.000 430.000 435.000 435.000 445.000 445.000 455.000 455.000 460.000 465.000 470.000 480.000 480.000 485.000 485.000 495.000 500.000 500.000 505.000 505.000 515.000 520.000 520.000 525.000 530.000 540.000 545.000 555.000 564.667 575.690 588.378 603.138 620.522 641.300 666.571 697.970
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 0 0 48 45 48 51 51 48 0 51 51 54 54 0 51 54 51 0 0 57 57 60 57 0 57 57 60 54 57 54 0 0 57 60 0 57 0 60 0 0 57 0 57 54 57 54 57 57 57 54 51 51 60 60 57 57 54 51 54 54 57 54 54 57 60 60 60 57 54 57 57 54 48 57 57 57 57 57 57 54 54 54 51 51 51 48 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -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 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
</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" >
89.485 90.0 95.0 100.0 105.0 110.0 111.568 113.135 114.703 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 370.18 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.278 2.93 3.276 3.386 3.263 3.263 3.386 3.394 3.528 3.653 3.773 3.892 4.011 4.129 4.249 4.37 4.492 4.617 4.744 4.873 5.004 5.136 5.271 5.407 5.544 5.682 5.82 5.959 6.098 6.236 6.374 6.511 6.646 6.781 6.915 7.047 7.177 7.306 7.434 7.559 7.683 7.806 7.926 8.045 8.161 8.275 8.387 8.496 8.601 8.703 8.8 8.891 8.976 9.052 9.119 9.174 9.215 9.241 9.25 9.25 9.248 9.241 9.23 9.214 9.194 9.17 9.142 9.111 9.076 9.038 8.996 8.952 8.904 8.854 8.801 8.745 8.688 8.628 8.566 8.501 8.436 8.368 8.299 8.228 8.156 8.083 8.009 7.934 7.857 7.78 7.702 7.623 7.544 7.464 7.384 7.304 7.223 7.142 7.061 6.979 6.898 6.816 6.735 6.654 6.573 6.492 6.411 6.331 6.251 6.171 6.092 6.013 5.934 5.856 5.779 5.702 5.626 5.55 5.474 5.4 5.326 5.252 5.179 5.107 5.036 4.965 4.895 4.826 4.757 4.689 4.622 4.555 4.49 4.424 4.36 4.297 4.234 4.172 4.11 4.05 3.99 3.931 3.872 3.814 3.757 3.701 3.646 3.591 3.537 3.483 3.431 3.379 3.328 3.277 3.227 3.178 3.129 3.082 3.034 2.988 2.942 2.897 2.852 2.808 2.765 2.722 2.68 2.639 2.598 2.557 2.518 2.479 2.44 2.402 2.365 2.328 2.291 2.256 2.22 2.186 2.151 2.118 2.085 2.052 2.02 1.988

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.386" PeakHeight="110.0" Num="3" Error="0.0">
-30.497 13.147 -3.165
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.386" EndFrequency="9.25" PeakHeight="370.18" Num="5" zHalfNm="236.104" Error="4.323">
-226.073 -40.418 13.994 -5.075 2.095
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.703" Depth="0.123"/>
<TopsideChapman PeakHeight="370.18" PeakDensity="1061569.5" PeakScaleHeight="97.009" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
