<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-12 -071 11:50:00.000"
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="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: 95% PACIFIC flags: Multiple candidates for F2x 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" >
2026.03.12 (071) 11:50:00</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">
FF202607103121150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.732" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.599" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.600" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.810" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="104.686" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="97.331" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="7.179" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.967" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.158" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="332.693" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="247.630" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.172" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="113.846" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="42.797" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="62.409" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="145.360" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.240" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="133">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 255.000 258.750 262.500 266.250 270.000 270.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 287.500 290.000 290.000 291.000 292.000 293.000 294.000 295.000 295.000 305.000 305.000 305.000 305.000 306.667 308.333 310.000 310.000 310.000 310.000 315.000 315.000 315.000 320.000 321.667 323.333 325.000 320.000 325.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 382.500 385.000 385.000 385.000 385.000 390.000 390.000 390.000 392.500 395.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 407.500 410.000 415.000 415.000 415.000 415.000 420.000 420.000 422.500 425.000 430.000 430.000 430.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 465.000 470.000 475.993 482.863 490.818 500.139 511.209 524.570 541.019
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 51 0 0 0 54 51 57 57 0 54 48 60 60 54 0 60 60 60 57 60 51 0 63 60 0 0 60 0 54 48 0 0 60 60 0 0 60 63 63 60 60 63 63 60 0 0 57 63 48 54 60 60 51 57 63 63 57 63 66 57 63 63 57 63 66 66 63 51 60 66 54 63 66 63 60 66 54 60 63 54 60 66 54 60 66 63 66 63 51 66 0 63 54 57 63 51 54 60 63 60 54 63 51 54 60 60 57 57 51 57 48 54 57 54 45 54 48 54 51 54 0 51 51 48 48 42 45 0 45 42 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 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="5">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.6 2.65 2.7 2.75 2.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
104.686 105.310 105.993 106.747 107.592
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 0 54 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 0.390625 0.390625 0.390625 1.953125
</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 97.331 100.0 100.695 104.058 105.0 107.422 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 332.693 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.655 2.81 2.738 2.695 2.695 2.727 2.81 2.901 3.067 3.224 3.377 3.528 3.68 3.833 3.987 4.145 4.305 4.468 4.635 4.806 4.98 5.158 5.341 5.527 5.717 5.911 6.109 6.31 6.514 6.722 6.933 7.146 7.363 7.581 7.802 8.026 8.251 8.477 8.705 8.934 9.164 9.394 9.623 9.851 10.075 10.293 10.503 10.7 10.876 11.024 11.133 11.192 11.2 11.199 11.185 11.159 11.121 11.071 11.01 10.939 10.859 10.77 10.673 10.568 10.457 10.34 10.217 10.089 9.957 9.821 9.681 9.538 9.393 9.246 9.096 8.946 8.794 8.642 8.489 8.335 8.182 8.029 7.877 7.725 7.574 7.424 7.276 7.128 6.982 6.838 6.695 6.554 6.415 6.278 6.142 6.009 5.877 5.748 5.62 5.495 5.372 5.251 5.132 5.016 4.901 4.789 4.679 4.571 4.465 4.361 4.259 4.16 4.062 3.967 3.873 3.782 3.692 3.605 3.519 3.435 3.353 3.273 3.194 3.118 3.043 2.97 2.898 2.828 2.76 2.693 2.628 2.564 2.502 2.441 2.382 2.324 2.268 2.212 2.158 2.106 2.054 2.004 1.955 1.907 1.861 1.815 1.771 1.727 1.685 1.644 1.603 1.564 1.525 1.488 1.451 1.416 1.381 1.347 1.314 1.282 1.25 1.219 1.189 1.16 1.131 1.104 1.076 1.05 1.024 0.999 0.974 0.95 0.927 0.904 0.881 0.86 0.838 0.818 0.798 0.778 0.759 0.74 0.722 0.704 0.687 0.67 0.653

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.81" PeakHeight="97.331" Num="3" Error="2.989">
-10.779 4.472 -1.024
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.81" EndFrequency="11.2" PeakHeight="332.693" Num="5" zHalfNm="247.63" Error="2.756">
-185.796 -52.553 14.239 -2.501 1.34
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.091" Depth="0.115"/>
<TopsideChapman PeakHeight="332.693" PeakDensity="1556327.5" PeakScaleHeight="62.409" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
