<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-22 -081 08:50:00.000"
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" >
2026.03.22 (081) 08:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608103220850009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="3.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.115" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="12.304" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.250" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="322.460" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.852" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="299.962" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="218.685" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.826" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="114.993" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.914" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.314" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="100.290" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.580" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="40">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 230.000 231.667 233.333 235.000 235.000 236.667 238.333 240.000 240.000 240.000 245.000 247.500 250.000 252.500 255.000 257.500 260.000 262.500 265.000 267.500 270.000 270.000 275.000 280.000 290.000 290.000 300.000 306.667 314.106 322.460 331.907 342.679 355.074 369.490 386.464 406.743 431.397 462.013 501.051
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 0 0 66 63 0 0 63 0 63 66 0 0 0 0 0 0 0 0 0 69 66 69 66 63 63 60 63 60 0 51 63 57 60 60 69 0 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 -0.390625 1.953125 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="183">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.462 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 131.575 135.0 140.0 145.0 150.0 153.149 155.0 160.0 165.0 170.0 174.724 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 299.962 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.567 0.738 0.825 0.852 0.838 0.796 0.719 0.597 0.544 0.544 0.544 0.544 0.544 0.544 0.57 0.642 0.713 0.785 0.852 0.858 0.966 1.09 1.245 1.456 1.756 2.106 2.407 2.646 2.841 3.006 3.148 3.272 3.382 3.479 3.565 3.641 3.708 3.766 3.815 3.857 3.891 3.917 3.935 3.946 3.95 3.95 3.947 3.94 3.928 3.912 3.891 3.867 3.839 3.808 3.774 3.738 3.698 3.657 3.613 3.568 3.52 3.472 3.422 3.371 3.319 3.266 3.212 3.158 3.104 3.049 2.994 2.939 2.884 2.829 2.775 2.72 2.666 2.612 2.559 2.506 2.454 2.402 2.351 2.3 2.251 2.201 2.153 2.105 2.058 2.012 1.967 1.922 1.878 1.835 1.793 1.751 1.71 1.67 1.631 1.593 1.555 1.518 1.482 1.447 1.412 1.379 1.345 1.313 1.281 1.25 1.22 1.19 1.161 1.133 1.106 1.078 1.052 1.026 1.001 0.977 0.952 0.929 0.906 0.884 0.862 0.841 0.82 0.799 0.78 0.76 0.741 0.723 0.705 0.688 0.67 0.654 0.637 0.622 0.606 0.591 0.576 0.562 0.548 0.534 0.521 0.508 0.495 0.483 0.471 0.459 0.447 0.436 0.425 0.414 0.404 0.394 0.384 0.374 0.365 0.356 0.347 0.338 0.33 0.321 0.313 0.306 0.298 0.29 0.283 0.276 0.269 0.262 0.256 0.249 0.243 0.237 0.231 0.225 0.22 0.214 0.209 0.203

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.852" PeakHeight="110.0" Num="3" Error="0.0">
-25.742 7.215 -1.011
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.852" EndFrequency="3.95" PeakHeight="299.962" Num="5" zHalfNm="218.685" Error="3.05">
-152.731 39.252 -11.942 -0.831 1.014
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="64.724" Depth="0.308"/>
<TopsideChapman PeakHeight="299.962" PeakDensity="193579.4" PeakScaleHeight="61.314" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
