<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-18 -077 10:20:00.000"
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" >
2026.03.18 (077) 10:20:00</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">
FF202607703181020009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.147" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.534" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="350.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.351" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="282.314" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="220.753" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.514" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="84.888" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="19.598" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="47.301" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="90.120" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.970" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="113">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.15 3.2 3.25 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 225.000 227.500 230.000 231.250 232.500 233.750 235.000 236.250 237.500 238.750 240.000 240.000 240.000 240.000 245.000 246.500 248.000 249.500 251.000 252.500 254.000 255.500 257.000 258.500 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 280.000 278.750 277.500 276.250 275.000 276.500 278.000 279.500 281.000 282.500 284.000 285.500 287.000 288.500 290.000 290.000 292.500 295.000 295.000 295.000 297.500 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 310.000 310.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 325.000 325.000 330.000 330.000 335.000 335.000 337.500 340.000 345.000 350.000 350.000 350.000 360.000 365.000 365.000 370.000 380.000 385.000 393.733 406.745 428.200 470.262
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 57 0 60 0 45 0 57 0 0 0 0 57 0 60 57 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 60 60 54 48 54 51 51 48 0 54 54 60 0 0 63 63 63 63 66 0 0 0 0 0 0 0 51 0 0 0 0 0 0 0 0 0 69 69 0 60 66 69 0 63 66 69 69 63 66 72 72 66 69 54 60 66 72 66 72 69 66 66 63 66 63 63 0 57 63 57 66 66 66 63 60 63 66 63 66 63 60 48
</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 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 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="173">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.673 90.0 95.0 100.0 105.0 110.0 115.0 116.336 120.0 122.671 125.0 129.007 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 282.314 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.228 1.578 2.036 2.275 2.351 2.273 2.225 2.225 2.225 2.271 2.351 2.383 2.535 2.68 2.823 2.967 3.116 3.27 3.431 3.602 3.784 3.978 4.187 4.413 4.656 4.919 5.201 5.5 5.814 6.138 6.465 6.789 7.103 7.402 7.679 7.932 8.156 8.348 8.505 8.625 8.706 8.746 8.75 8.747 8.728 8.692 8.64 8.574 8.494 8.402 8.299 8.187 8.067 7.939 7.804 7.664 7.519 7.37 7.219 7.065 6.909 6.752 6.594 6.436 6.278 6.121 5.965 5.811 5.657 5.506 5.357 5.21 5.065 4.923 4.783 4.646 4.512 4.38 4.252 4.126 4.004 3.884 3.767 3.653 3.542 3.434 3.329 3.227 3.127 3.03 2.936 2.845 2.756 2.67 2.586 2.504 2.425 2.349 2.274 2.202 2.132 2.065 1.999 1.935 1.873 1.813 1.755 1.699 1.645 1.592 1.541 1.491 1.443 1.397 1.352 1.308 1.266 1.225 1.186 1.148 1.11 1.075 1.04 1.006 0.974 0.942 0.912 0.882 0.854 0.826 0.799 0.773 0.748 0.724 0.701 0.678 0.656 0.635 0.614 0.594 0.575 0.556 0.538 0.521 0.504 0.487 0.472 0.456 0.441 0.427 0.413 0.4 0.387 0.374 0.362 0.35 0.339 0.328 0.317 0.307 0.297 0.287 0.278 0.269 0.26 0.252 0.244 0.236 0.228 0.221 0.214 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.351" PeakHeight="110.0" Num="3" Error="0.0">
-29.542 11.769 -2.554
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.351" EndFrequency="8.75" PeakHeight="282.314" Num="5" zHalfNm="220.753" Error="1.533">
-132.157 -19.176 -4.238 1.265 0.999
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="19.007" Depth="0.126"/>
<TopsideChapman PeakHeight="282.314" PeakDensity="949906.94" PeakScaleHeight="47.301" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
