<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-23 -082 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" >
2026.03.23 (082) 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">
FF202608203231130009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.906" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.383" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="6.250" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.100" 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="34" Val="120.000" Name="h`Es" 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="10.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" 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="2.875" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="301.382" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="230.622" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.147" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.150" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="91.598" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="32.414" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="50.113" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="125.880" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.070" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="5.500" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="107">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
275.000 275.000 275.000 275.000 277.500 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 281.429 282.857 284.286 285.714 287.143 288.571 290.000 290.000 290.000 290.000 290.000 295.000 296.818 298.636 300.455 302.273 304.091 305.909 307.727 309.545 311.364 313.182 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 357.500 360.000 360.000 360.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 425.000 430.000 435.000 435.000 440.000 450.785
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 45 48 57 0 48 0 57 0 63 0 60 57 54 0 0 66 0 0 0 69 0 0 54 54 63 0 0 51 0 60 0 0 0 0 0 57 66 0 69 63 69 72 72 69 72 60 66 66 66 60 66 69 60 63 54 57 60 51 54 66 63 60 57 57 57 57 51 60 0 54 57 54 51 57 63 63 60 63 66 63 60 66 63 60 63 63 66 60 63 54 60 51 54 60 57 66 60 66 69 63 54 54 51 48 45 45
</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 2.734375 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 0.390625 0.390625 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="63">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
125.000 125.000 130.000 133.750 137.500 141.250 145.000 142.500 140.000 137.500 135.000 135.000 135.000 135.000 130.000 130.000 130.000 130.000 125.000 127.500 130.000 125.000 125.000 125.000 125.000 127.500 130.000 130.000 127.500 125.000 122.500 120.000 125.000 120.000 122.500 125.000 123.333 121.667 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 57 57 0 48 0 51 0 60 57 57 0 57 48 45 0 0 51 48 0 57 66 60 54 60 0 54 57 0 60 0 45 60 63 0 66 0 0 69 60 66 66 69 0 0 0 66 69 0 66 69 0 0 0 69 0 0 66 0 0 0 69 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -0.390625 1.953125 0.390625 -0.390625 0.390625 1.171875 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 -1.171875 0.390625 0.390625 -0.390625 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
</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" >
89.567 90.0 95.0 100.0 105.0 110.0 113.781 115.0 117.562 120.0 121.343 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 301.382 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.932 2.489 2.782 2.875 2.753 2.753 2.753 2.832 2.875 3.081 3.317 3.532 3.739 3.943 4.145 4.349 4.554 4.761 4.97 5.181 5.394 5.61 5.826 6.045 6.264 6.485 6.708 6.931 7.155 7.381 7.608 7.837 8.067 8.3 8.534 8.771 9.011 9.253 9.499 9.748 9.998 10.246 10.482 10.683 10.794 10.8 10.795 10.77 10.727 10.666 10.589 10.498 10.393 10.276 10.149 10.011 9.865 9.712 9.551 9.386 9.215 9.041 8.863 8.683 8.501 8.318 8.134 7.95 7.766 7.583 7.401 7.221 7.042 6.865 6.69 6.517 6.347 6.18 6.015 5.853 5.695 5.539 5.386 5.237 5.091 4.948 4.808 4.672 4.539 4.409 4.282 4.158 4.037 3.92 3.805 3.694 3.585 3.48 3.377 3.277 3.18 3.085 2.993 2.904 2.817 2.733 2.651 2.571 2.494 2.419 2.346 2.275 2.206 2.14 2.075 2.012 1.951 1.892 1.834 1.779 1.725 1.672 1.621 1.572 1.524 1.477 1.432 1.389 1.346 1.305 1.265 1.227 1.189 1.153 1.118 1.083 1.05 1.018 0.987 0.957 0.928 0.899 0.872 0.845 0.819 0.794 0.77 0.746 0.723 0.701 0.679 0.659 0.638 0.619 0.6 0.582 0.564 0.546 0.53 0.513 0.498 0.482 0.468 0.453 0.439 0.426 0.413 0.4 0.388 0.376 0.364 0.353 0.342 0.332 0.322 0.312 0.302 0.293 0.284 0.275 0.267 0.259 0.251 0.243 0.236 0.228

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.875" PeakHeight="110.0" Num="3" Error="0.0">
-30.088 12.545 -2.89
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.875" EndFrequency="10.8" PeakHeight="301.382" Num="5" zHalfNm="230.622" Error="2.513">
-146.194 -51.918 21.164 -4.639 1.548
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.343" Depth="0.122"/>
<TopsideChapman PeakHeight="301.382" PeakDensity="1447146.4" PeakScaleHeight="50.113" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
