<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-15 -074 20:30:00.000"
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 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 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" >
2026.03.15 (074) 20:30:00</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">
FF202607403152030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.734" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.214" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.350" 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="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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="470.580" 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="1.867" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="345.860" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="275.977" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.628" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="97.024" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="33.373" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="49.783" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="111.100" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.410" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="166">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 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 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 255.000 255.000 255.000 255.000 255.000 255.000 256.667 258.333 260.000 260.000 260.000 260.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 266.250 267.500 268.750 270.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 285.000 290.000 291.667 293.333 295.000 295.000 295.000 295.000 295.000 295.000 297.500 300.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 305.000 306.667 308.333 310.000 311.667 313.333 315.000 316.667 318.333 320.000 321.667 323.333 325.000 325.000 325.000 327.000 329.000 331.000 333.000 335.000 335.000 335.000 337.500 340.000 340.000 340.000 340.000 340.000 341.667 343.333 345.000 347.500 350.000 350.000 352.500 355.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 360.000 365.000 370.000 370.000 372.500 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 382.500 385.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 395.000 395.000 405.000 405.000 405.000 410.000 410.000 412.500 415.000 417.500 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 460.000 460.000 461.098 462.375 463.879 465.676 467.863 470.580 474.046 478.623 484.945 494.245 509.275
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 63 0 66 66 60 66 0 0 66 66 66 66 69 0 69 69 66 63 66 0 0 0 60 60 0 69 69 69 0 63 57 69 69 0 0 60 69 69 0 66 63 69 0 0 0 0 0 72 0 69 0 69 0 72 0 69 72 72 0 0 72 66 0 0 0 0 0 0 0 0 0 0 0 63 66 72 0 63 45 0 57 0 66 0 57 60 66 69 69 0 0 72 60 66 69 0 63 0 72 57 0 69 69 60 72 69 57 63 48 54 60 63 69 54 60 66 69 60 66 69 57 63 66 57 60 66 66 66 66 57 63 66 57 63 0 0 0 60 63 60 60 57 60 54 57 54 54 54 51 54 51 48 48 48 48 45 45 48 45 42 42 45 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
89.8 90.0 95.0 100.0 105.0 110.0 115.0 118.963 120.0 125.0 127.926 130.0 135.0 136.889 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 345.86 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.217 1.25 1.617 1.807 1.867 1.826 1.732 1.732 1.732 1.732 1.763 1.839 1.867 1.945 2.065 2.183 2.302 2.424 2.552 2.686 2.828 2.98 3.142 3.318 3.508 3.712 3.933 4.169 4.42 4.684 4.958 5.238 5.523 5.809 6.095 6.38 6.661 6.94 7.217 7.49 7.761 8.03 8.296 8.562 8.826 9.089 9.352 9.613 9.872 10.128 10.377 10.613 10.82 10.977 11.048 11.05 11.043 11.015 10.968 10.904 10.822 10.726 10.617 10.494 10.361 10.218 10.066 9.907 9.741 9.569 9.393 9.212 9.029 8.843 8.655 8.466 8.277 8.087 7.898 7.71 7.523 7.337 7.153 6.972 6.792 6.615 6.441 6.269 6.101 5.935 5.773 5.613 5.458 5.305 5.156 5.01 4.867 4.728 4.592 4.459 4.33 4.203 4.081 3.961 3.844 3.731 3.62 3.513 3.408 3.307 3.208 3.112 3.018 2.928 2.839 2.754 2.671 2.59 2.511 2.435 2.361 2.289 2.22 2.152 2.087 2.023 1.961 1.901 1.843 1.787 1.732 1.679 1.628 1.578 1.529 1.482 1.437 1.393 1.35 1.308 1.268 1.229 1.191 1.155 1.119 1.085 1.051 1.019 0.988 0.957 0.928 0.899 0.871 0.844 0.818 0.793 0.769 0.745 0.722 0.7 0.678 0.657 0.637 0.617 0.598 0.58 0.562 0.545 0.528 0.511 0.496 0.48 0.465 0.451 0.437 0.424 0.411 0.398 0.386 0.374 0.362 0.351 0.34 0.33 0.319 0.31 0.3

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.867" PeakHeight="110.0" Num="3" Error="0.0">
-28.851 10.828 -2.177
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.867" EndFrequency="11.05" PeakHeight="345.86" Num="5" zHalfNm="275.977" Error="4.157">
-170.662 -47.536 15.166 -10.006 4.067
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="26.889" Depth="0.135"/>
<TopsideChapman PeakHeight="345.86" PeakDensity="1514919.4" PeakScaleHeight="49.783" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
