<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-12 -071 18:10:00.000"
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="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: 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" >
2026.03.12 (071) 18:10:00</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">
FF202607103121810009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="11.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.660" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.191" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="10.650" 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="3.029" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.188" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="354.628" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="257.063" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.435" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="131.834" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.493" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="72.734" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="155.480" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.530" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="141">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.1 11.15 11.2 11.25 11.3 11.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 248.750 252.500 256.250 260.000 260.000 265.000 265.000 266.250 267.500 268.750 270.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 282.500 285.000 285.000 285.000 287.500 290.000 295.000 296.250 297.500 298.750 300.000 300.000 300.000 302.500 305.000 307.500 310.000 310.000 310.000 310.000 315.000 316.250 317.500 318.750 320.000 325.000 325.000 325.000 327.500 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 342.500 345.000 345.000 347.500 350.000 350.000 355.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 372.500 375.000 375.000 375.000 380.000 380.000 382.500 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 455.000 460.000 465.000 465.000 460.000 465.000 470.412 476.322 482.803 489.940 497.840 506.632 516.475 527.570 540.173 554.612 571.320 590.880 614.087
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 0 0 48 51 48 48 0 45 0 51 54 57 54 51 45 57 54 51 0 57 54 48 0 57 0 0 0 0 60 57 51 0 0 0 60 57 0 51 63 0 0 0 60 60 0 63 0 63 0 66 60 63 0 63 60 66 63 0 63 63 0 63 66 51 0 60 63 66 66 66 69 57 0 63 69 60 63 69 57 63 63 66 63 63 54 63 69 69 63 63 54 63 66 54 60 45 66 60 63 51 63 66 54 57 48 54 60 51 57 60 54 57 57 57 51 54 54 48 54 51 54 54 51 51 48 48 48 45 0 0 42 0 0 48 0 42 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 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 1.171875 1.171875 1.171875 -0.390625 -0.390625 2.734375 1.171875 -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" >
89.541 90.0 95.0 100.0 105.0 110.0 113.088 115.0 116.176 119.264 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 354.628 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.036 2.622 2.931 3.029 2.907 2.907 2.907 3.029 3.052 3.202 3.349 3.494 3.638 3.784 3.932 4.082 4.236 4.392 4.553 4.717 4.886 5.06 5.238 5.42 5.608 5.8 5.996 6.197 6.403 6.612 6.825 7.041 7.261 7.483 7.707 7.932 8.159 8.386 8.614 8.841 9.066 9.29 9.511 9.727 9.939 10.144 10.34 10.527 10.701 10.861 11.003 11.124 11.222 11.294 11.337 11.35 11.35 11.344 11.328 11.303 11.268 11.225 11.174 11.115 11.049 10.976 10.897 10.812 10.721 10.625 10.525 10.42 10.312 10.199 10.084 9.966 9.845 9.721 9.596 9.469 9.34 9.21 9.079 8.947 8.815 8.682 8.549 8.416 8.283 8.15 8.017 7.885 7.753 7.622 7.492 7.363 7.235 7.108 6.982 6.857 6.734 6.612 6.491 6.371 6.253 6.137 6.022 5.908 5.796 5.686 5.577 5.469 5.364 5.26 5.157 5.056 4.957 4.86 4.763 4.669 4.576 4.485 4.395 4.307 4.221 4.136 4.052 3.97 3.89 3.81 3.733 3.657 3.582 3.509 3.437 3.366 3.297 3.229 3.162 3.097 3.033 2.97 2.909 2.848 2.789 2.731 2.675 2.619 2.564 2.511 2.458 2.407 2.357 2.307 2.259 2.212 2.165 2.12 2.075 2.032 1.989 1.947 1.906 1.866 1.827 1.789 1.751 1.714 1.678 1.643 1.608 1.574 1.541 1.508 1.476 1.445 1.415 1.385 1.355 1.327 1.299 1.271 1.244 1.218 1.192 1.167

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.029" PeakHeight="110.0" Num="3" Error="0.0">
-30.219 12.738 -2.978
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.029" EndFrequency="11.35" PeakHeight="354.628" Num="5" zHalfNm="257.063" Error="2.922">
-203.596 -38.352 6.677 -1.065 0.972
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.264" Depth="0.122"/>
<TopsideChapman PeakHeight="354.628" PeakDensity="1598294.0" PeakScaleHeight="72.734" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
