<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-20 -079 14:50:00.000"
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 1 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" >
2026.03.20 (079) 14:50:00</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">
FF202607903201450009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="9.625" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.223" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.731" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.215" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="195.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="303.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="440.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.405" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.367" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="314.751" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="178.026" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="223.590" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.117" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="106.274" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="64.978" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="33.701" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="67.126" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="148.660" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.380" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.380" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="88">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
303.000 306.000 309.000 312.000 315.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 322.500 325.000 325.000 325.000 327.500 330.000 332.500 335.000 335.000 335.000 335.000 335.000 338.333 341.667 345.000 345.000 350.000 350.000 352.500 355.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 380.000 380.000 382.500 385.000 390.000 390.000 395.000 395.000 400.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 430.000 430.000 435.000 440.000 440.000 450.000 455.000 460.000 465.000 465.000 470.837 477.448 485.000 493.708 503.860 515.848 530.218
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 45 48 54 0 51 57 0 0 0 51 51 54 57 0 60 63 0 57 54 54 51 57 0 54 57 60 0 0 0 60 60 0 60 57 0 0 60 63 54 63 54 63 69 60 63 54 60 51 60 66 60 48 54 0 60 57 63 60 63 63 60 63 63 60 60 63 66 63 66 66 63 60 54 54 54 51 57 60 63 60 60 57 57 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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="F1" Polarization="O" Num="17">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
195.000 195.000 200.000 209.167 218.333 227.500 236.667 245.833 255.000 261.667 268.333 275.000 281.667 288.333 295.000 300.000 300.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 48 0 0 0 0 45 45 0 51 0 0 0 54 48 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 0.390625 1.953125 1.171875 0.390625 0.390625 -0.390625 0.390625 1.953125 -0.390625 1.953125 -2.734375 -1.171875 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.481 90.0 95.0 100.0 105.0 110.0 111.488 112.977 114.465 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 178.026 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 314.751 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.291 2.947 3.294 3.405 3.282 3.282 3.405 3.43 3.622 3.818 4.042 4.262 4.44 4.581 4.699 4.803 4.898 4.988 5.079 5.175 5.223 5.275 5.411 5.554 5.707 5.871 6.047 6.236 6.438 6.65 6.868 7.086 7.3 7.506 7.703 7.89 8.068 8.238 8.4 8.556 8.707 8.853 8.994 9.132 9.265 9.392 9.506 9.593 9.625 9.625 9.619 9.604 9.579 9.545 9.503 9.452 9.395 9.33 9.259 9.182 9.1 9.012 8.92 8.823 8.723 8.619 8.512 8.402 8.289 8.175 8.058 7.941 7.821 7.701 7.58 7.458 7.336 7.214 7.091 6.969 6.847 6.725 6.604 6.484 6.364 6.246 6.128 6.011 5.896 5.781 5.668 5.556 5.446 5.337 5.23 5.124 5.019 4.916 4.815 4.715 4.617 4.52 4.425 4.331 4.239 4.149 4.06 3.973 3.888 3.804 3.722 3.641 3.562 3.484 3.408 3.333 3.26 3.188 3.117 3.048 2.981 2.915 2.85 2.786 2.724 2.664 2.604 2.546 2.489 2.433 2.378 2.325 2.272 2.221 2.171 2.122 2.074 2.027 1.981 1.936 1.892 1.849 1.807 1.766 1.726 1.687 1.649 1.611 1.574 1.538 1.503 1.469 1.436 1.403 1.371 1.339 1.309 1.279 1.25 1.221 1.193 1.166 1.139 1.113 1.088 1.063 1.038 1.015 0.991 0.969 0.946 0.925 0.903 0.883 0.863 0.843 0.823 0.804 0.786 0.768 0.75 0.733 0.716 0.7 0.684 0.668 0.653

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.405" PeakHeight="110.0" Num="3" Error="0.0">
-30.51 13.166 -3.175
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.405" EndFrequency="5.223" PeakHeight="178.026" Num="5" Error="0.0">
-52.496 -18.254 11.741 -6.4 1.848
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.223" EndFrequency="9.625" PeakHeight="314.751" Num="5" zHalfNm="223.59" Error="2.942">
-111.053 -30.586 10.082 -6.585 1.417
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.465" Depth="0.123"/>
<TopsideChapman PeakHeight="314.751" PeakDensity="1149387.4" PeakScaleHeight="67.126" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
