<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-08 -067 16:00:00.000"
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: 90% PACIFIC flags: One of F2 cusps was derived from the other</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" >
2026.03.08 (067) 16:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606703081600009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.756" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.766" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.200" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.410" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.100" 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="24" Val="102.592" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="96.471" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="6.307" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="1.000" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" 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="3.379" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.355" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="318.755" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="233.921" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.686" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="107.637" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.760" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.964" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="152.020" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.100" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="116">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
275.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 290.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 317.500 320.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 345.000 346.667 348.333 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 363.333 366.667 370.000 370.000 375.000 375.000 377.500 380.000 380.000 385.000 385.000 385.000 390.000 390.000 392.500 395.000 400.000 400.000 400.000 402.500 405.000 410.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 420.000 422.500 425.000 427.500 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 455.000 457.500 460.000 460.000 465.000 470.000 477.786 487.721 500.837 518.952
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 51 54 57 57 57 0 57 0 54 57 60 60 57 57 60 60 60 60 60 60 60 0 57 60 60 57 51 60 60 60 54 0 63 63 0 66 60 60 66 63 60 63 51 57 60 66 66 66 66 66 0 0 63 66 66 66 51 66 66 69 69 66 60 0 0 66 66 66 69 0 63 66 60 0 63 60 63 0 60 54 60 60 57 63 57 66 72 69 69 63 60 66 0 0 63 0 57 54 57 51 51 48 48 45 42 0 45 48 51 51 0 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 1.953125 -2.734375 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="5">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.2 3.25 3.3 3.35 3.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
102.592 103.425 104.371 105.471 106.789
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 48 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 0.390625 -1.171875 -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 96.471 98.067 99.664 100.0 101.26 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 318.755 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.313 3.41 3.286 3.286 3.312 3.41 3.543 3.699 3.843 3.981 4.116 4.25 4.383 4.517 4.653 4.791 4.931 5.074 5.221 5.371 5.524 5.682 5.844 6.01 6.18 6.354 6.533 6.715 6.901 7.091 7.284 7.481 7.68 7.882 8.086 8.293 8.501 8.711 8.923 9.135 9.349 9.561 9.773 9.982 10.185 10.377 10.55 10.69 10.779 10.8 10.8 10.79 10.767 10.732 10.685 10.628 10.561 10.484 10.399 10.306 10.205 10.098 9.985 9.866 9.743 9.615 9.483 9.347 9.209 9.068 8.925 8.78 8.634 8.487 8.339 8.19 8.041 7.892 7.744 7.596 7.449 7.302 7.157 7.012 6.869 6.727 6.587 6.449 6.312 6.177 6.043 5.912 5.782 5.655 5.529 5.406 5.285 5.165 5.048 4.933 4.82 4.709 4.6 4.494 4.389 4.287 4.186 4.088 3.992 3.897 3.805 3.715 3.626 3.54 3.455 3.372 3.291 3.212 3.135 3.059 2.985 2.913 2.842 2.773 2.706 2.64 2.576 2.513 2.452 2.392 2.333 2.276 2.22 2.166 2.113 2.061 2.01 1.961 1.912 1.865 1.819 1.775 1.731 1.688 1.646 1.606 1.566 1.527 1.49 1.453 1.417 1.382 1.348 1.314 1.282 1.25 1.219 1.189 1.159 1.131 1.102 1.075 1.048 1.022 0.997 0.972 0.948 0.925 0.902 0.879 0.857 0.836 0.815 0.795 0.775 0.756 0.737 0.719 0.701 0.684 0.667 0.65 0.634 0.618 0.603 0.588 0.573

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.41" PeakHeight="96.471" Num="3" Error="2.106">
-9.622 4.153 -1.002
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.41" EndFrequency="10.8" PeakHeight="318.755" Num="5" zHalfNm="233.921" Error="4.041">
-168.645 -61.766 12.895 -1.888 1.909
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.789" Depth="0.124"/>
<TopsideChapman PeakHeight="318.755" PeakDensity="1447146.4" PeakScaleHeight="61.964" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
