<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-31 -090 11:30:00.000"
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" >
2026.03.31 (090) 11:30:00</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">
FF202609003311130009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.629" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.396" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="455.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.882" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="346.776" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="248.917" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.147" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="130.730" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.735" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="71.104" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="155.200" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.470" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="132">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 237.500 240.000 240.000 245.000 245.000 247.500 250.000 255.000 260.000 260.000 265.000 265.000 270.000 270.000 275.000 277.500 280.000 280.000 280.000 281.667 283.333 285.000 287.500 290.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 296.250 297.500 298.750 300.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 325.000 325.000 328.333 331.667 335.000 335.000 335.000 335.000 335.000 335.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 445.000 450.000 455.000 455.000 460.000 465.000 470.000 475.000 478.311 481.985 486.085 490.690 495.899 501.839 508.676 516.629 525.997 537.193 550.811 567.732 589.322
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 51 57 57 57 0 54 60 57 57 57 57 54 57 54 0 54 57 60 0 0 60 0 0 60 63 63 60 0 63 60 0 0 0 60 60 0 60 57 0 60 60 57 0 63 60 57 60 0 60 57 63 63 0 0 54 60 0 66 63 63 63 57 60 66 69 63 66 66 63 66 57 63 66 57 63 66 60 66 66 66 66 63 66 60 66 60 63 63 63 63 63 57 63 63 60 63 63 63 57 63 63 66 60 63 60 63 57 51 57 60 60 57 57 60 57 54 51 51 51 54 51 54 0 48 45 48 0 51 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 -0.390625 -0.390625 1.953125 -0.390625 1.171875 2.734375
</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" >
89.566 90.0 95.0 100.0 105.0 110.0 113.75 115.0 117.499 120.0 121.249 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 346.776 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.937 2.495 2.788 2.882 2.76 2.76 2.76 2.841 2.882 3.0 3.152 3.302 3.452 3.604 3.759 3.918 4.082 4.251 4.425 4.605 4.791 4.981 5.177 5.377 5.58 5.787 5.995 6.206 6.417 6.629 6.841 7.053 7.263 7.473 7.682 7.889 8.095 8.299 8.501 8.701 8.9 9.095 9.288 9.478 9.664 9.845 10.019 10.185 10.34 10.48 10.602 10.699 10.766 10.798 10.8 10.798 10.786 10.765 10.734 10.695 10.648 10.593 10.53 10.461 10.385 10.303 10.216 10.123 10.026 9.925 9.819 9.71 9.598 9.483 9.365 9.245 9.123 8.999 8.874 8.747 8.619 8.491 8.362 8.233 8.103 7.973 7.844 7.714 7.585 7.457 7.329 7.202 7.076 6.951 6.826 6.703 6.581 6.46 6.341 6.223 6.106 5.99 5.876 5.764 5.653 5.544 5.436 5.329 5.225 5.122 5.02 4.92 4.822 4.725 4.63 4.536 4.444 4.354 4.265 4.178 4.092 4.008 3.925 3.844 3.765 3.687 3.61 3.535 3.461 3.389 3.318 3.248 3.18 3.113 3.047 2.983 2.92 2.858 2.798 2.738 2.68 2.623 2.568 2.513 2.459 2.407 2.356 2.305 2.256 2.208 2.16 2.114 2.069 2.024 1.981 1.938 1.897 1.856 1.816 1.777 1.739 1.701 1.665 1.629 1.594 1.559 1.526 1.493 1.461 1.429 1.398 1.368 1.338 1.309 1.281 1.253 1.226 1.2 1.174 1.148 1.124 1.099 1.075 1.052 1.029 1.007

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.882" PeakHeight="110.0" Num="3" Error="0.0">
-30.094 12.554 -2.894
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.882" EndFrequency="10.8" PeakHeight="346.776" Num="5" zHalfNm="248.917" Error="3.579">
-196.382 -39.002 13.164 -5.244 1.937
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.249" Depth="0.122"/>
<TopsideChapman PeakHeight="346.776" PeakDensity="1447146.4" PeakScaleHeight="71.104" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
