<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-20 -079 12:10:00.000"
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: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</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) 12:10:00</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">
FF202607903201210009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.625" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.696" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.750" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.010" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="110.513" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="100.632" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="10.395" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="470.000" 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="3.066" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.206" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="345.207" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="247.593" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.186" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="129.007" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="43.144" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="71.518" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="159.150" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.390" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="126">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 230.000 237.500 245.000 245.000 245.000 251.667 258.333 265.000 270.000 275.000 280.000 285.000 285.000 295.000 295.000 300.000 300.000 302.500 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 312.500 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 321.250 322.500 323.750 325.000 326.250 327.500 328.750 330.000 331.250 332.500 333.750 335.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 355.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 365.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 410.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 460.000 465.000 470.000 470.000 470.000 475.000 480.000 490.000 495.000 495.000 500.000 510.000 515.000 520.000 530.000 547.500 565.000 592.151
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 0 48 60 60 0 0 48 0 0 0 51 51 60 69 63 63 0 48 0 54 51 51 0 0 57 0 54 0 54 0 0 57 0 57 57 57 66 63 60 57 0 0 0 0 54 0 0 0 0 0 0 60 51 0 57 60 48 0 57 51 57 48 57 66 66 66 66 63 66 69 69 60 69 72 69 72 66 69 63 69 60 66 66 63 63 63 51 60 66 60 63 60 63 60 63 60 63 60 63 60 54 63 60 63 60 54 60 57 54 60 60 60 60 57 54 54 54 51 54 51 48 0 51 42
</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 1.171875 -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 -1.953125 -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 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="6">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.75 2.8 2.85 2.9 2.95 3.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.513 111.194 111.946 112.788 113.745 114.856
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 51 0 54 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 2.734375 -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" >
90.0 95.0 100.0 100.632 103.557 105.0 106.482 109.407 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 345.207 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.531 3.004 3.01 2.89 2.89 2.89 3.01 3.029 3.174 3.31 3.44 3.568 3.695 3.823 3.954 4.086 4.222 4.361 4.504 4.651 4.803 4.96 5.121 5.288 5.459 5.635 5.815 5.999 6.186 6.377 6.57 6.765 6.961 7.159 7.357 7.555 7.754 7.951 8.148 8.344 8.538 8.731 8.921 9.11 9.295 9.476 9.652 9.822 9.983 10.133 10.268 10.383 10.472 10.529 10.55 10.55 10.545 10.531 10.508 10.476 10.435 10.387 10.331 10.269 10.2 10.125 10.044 9.958 9.867 9.771 9.672 9.569 9.462 9.353 9.24 9.125 9.008 8.889 8.769 8.647 8.524 8.399 8.275 8.149 8.024 7.898 7.772 7.646 7.52 7.395 7.271 7.146 7.023 6.901 6.779 6.658 6.539 6.42 6.303 6.187 6.073 5.959 5.847 5.736 5.627 5.52 5.413 5.309 5.205 5.104 5.003 4.905 4.808 4.712 4.618 4.526 4.435 4.345 4.258 4.171 4.086 4.003 3.921 3.841 3.762 3.685 3.609 3.534 3.461 3.389 3.319 3.25 3.182 3.115 3.05 2.986 2.924 2.862 2.802 2.743 2.685 2.629 2.573 2.519 2.465 2.413 2.362 2.312 2.263 2.215 2.168 2.121 2.076 2.032 1.989 1.946 1.905 1.864 1.824 1.785 1.747 1.71 1.673 1.637 1.602 1.568 1.534 1.501 1.469 1.438 1.407 1.377 1.347 1.318 1.29 1.262 1.235 1.208 1.182 1.157 1.132 1.108 1.084 1.06 1.038 1.015 0.993

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.01" PeakHeight="100.632" Num="3" Error="4.227">
-15.698 6.608 -1.542
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.01" EndFrequency="10.55" PeakHeight="345.207" Num="5" zHalfNm="247.593" Error="4.674">
-196.633 -48.808 11.02 -3.694 2.315
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.775" Depth="0.12"/>
<TopsideChapman PeakHeight="345.207" PeakDensity="1380924.4" PeakScaleHeight="71.518" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
