<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-18 -077 16:40:00.000"
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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 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) 16:40:00</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">
FF202607703181640009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="9.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.504" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.790" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.850" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.160" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="99.280" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="95.496" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="5.367" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.000" 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="3.311" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.323" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="355.644" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="235.139" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.968" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="156.320" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.853" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="87.315" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="196.980" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.380" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="93">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 303.000 306.000 309.000 312.000 315.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 325.000 326.250 327.500 328.750 330.000 332.500 335.000 335.000 340.000 345.000 347.500 350.000 350.000 350.000 351.667 353.333 355.000 355.000 360.000 360.000 362.500 365.000 367.500 370.000 370.000 370.000 375.000 375.000 378.333 381.667 385.000 388.333 391.667 395.000 397.500 400.000 405.000 405.000 410.000 410.000 420.000 425.000 425.000 425.000 430.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 460.000 460.000 465.000 465.000 475.000 475.000 480.000 485.000 490.000 495.000 495.000 500.000 505.000 510.000 515.000 520.000 525.000 535.000 540.000 550.000 560.000 570.000 585.000 601.120 620.437 644.008
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 0 0 0 54 48 0 0 54 45 0 57 60 57 54 0 0 0 54 0 57 51 54 45 0 45 51 57 0 0 57 63 57 60 0 57 0 54 54 54 57 51 0 0 0 0 0 48 0 57 48 54 54 51 51 45 54 57 54 54 54 54 54 57 60 63 60 57 60 57 54 60 57 54 48 45 57 57 51 54 54 57 51 57 57 60 57 57 60 57 54 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 -0.390625 2.734375 -1.171875 -0.390625 0.390625 -1.171875 0.390625 -0.390625 -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 -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 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="7">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.85 2.9 2.95 3.0 3.05 3.1 3.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
99.280 99.807 100.375 100.993 101.668 102.415 103.250
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 0 48 0 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -1.953125 -1.953125 -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" >
90.0 95.0 95.496 97.374 99.251 100.0 101.129 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 355.644 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.146 3.16 3.043 3.043 3.09 3.16 3.293 3.445 3.587 3.724 3.858 3.99 4.122 4.254 4.387 4.522 4.657 4.795 4.933 5.074 5.216 5.36 5.505 5.651 5.798 5.947 6.095 6.245 6.395 6.545 6.696 6.846 6.996 7.146 7.296 7.445 7.593 7.741 7.889 8.035 8.18 8.325 8.467 8.609 8.748 8.886 9.02 9.151 9.278 9.398 9.512 9.616 9.709 9.786 9.846 9.885 9.9 9.9 9.898 9.889 9.875 9.855 9.829 9.799 9.763 9.722 9.677 9.628 9.575 9.518 9.457 9.393 9.326 9.255 9.182 9.106 9.028 8.948 8.865 8.781 8.695 8.607 8.518 8.427 8.336 8.243 8.15 8.055 7.96 7.865 7.769 7.673 7.576 7.479 7.382 7.286 7.189 7.092 6.996 6.9 6.804 6.709 6.614 6.52 6.426 6.333 6.24 6.148 6.057 5.967 5.877 5.788 5.7 5.613 5.526 5.441 5.356 5.272 5.19 5.108 5.027 4.947 4.868 4.79 4.712 4.636 4.561 4.487 4.414 4.342 4.27 4.2 4.131 4.062 3.995 3.928 3.863 3.798 3.735 3.672 3.61 3.55 3.49 3.431 3.373 3.315 3.259 3.204 3.149 3.095 3.042 2.99 2.939 2.889 2.839 2.79 2.742 2.695 2.648 2.603 2.558 2.513 2.47 2.427 2.385 2.344 2.303 2.263 2.223 2.185 2.147 2.109 2.072 2.036 2.001 1.966 1.931 1.898 1.864 1.832 1.8 1.768 1.737 1.707 1.677 1.647 1.618

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.16" PeakHeight="95.496" Num="3" Error="1.773">
-8.138 3.46 -0.818
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.16" EndFrequency="9.9" PeakHeight="355.644" Num="5" zHalfNm="235.139" Error="4.229">
-221.973 -47.421 16.915 -3.883 1.847
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.633" Depth="0.117"/>
<TopsideChapman PeakHeight="355.644" PeakDensity="1216005.0" PeakScaleHeight="87.315" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
