<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-23 -082 16:10:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2o cusp, 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" >
2026.03.23 (082) 16:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608203231610009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="11.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.671" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.390" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="8.200" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="115.000" Name="h`Es" 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="10.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="395.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.359" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.346" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="337.629" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="227.717" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.763" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.500" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="146.662" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="58.651" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="79.948" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="171.190" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.570" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="8.050" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="75">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 352.500 350.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 400.000 395.000 402.500 410.000 410.000 410.000 415.000 415.000 420.000 422.500 425.000 429.000 433.000 437.000 441.000 445.000 445.000 450.000 455.000 460.000 465.000 470.904 477.222 484.001 491.292 499.156 507.664 516.896 526.951 537.943 550.010 563.318 578.067 594.506 612.944
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 78 75 72 72 66 63 72 69 69 60 63 0 0 66 66 66 66 63 66 66 60 66 66 60 63 66 63 63 63 60 60 48 57 60 51 57 60 51 57 57 54 0 48 54 51 51 48 48 45 48 0 0 0 0 48 45 0 45 0 48 42 0 0 0 45 0 45 45 0 45 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 1.953125 0.390625 0.390625 0.390625 0.390625 -1.953125 0.390625 1.171875 -1.171875 -1.171875 -2.734375 -2.734375 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -2.734375 -1.171875 0.390625 0.390625 0.390625 -1.171875 0.390625 0.390625 1.171875 1.171875 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="75">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
125.000 125.000 125.000 125.000 122.500 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 120.000 120.000 115.000 115.313 115.625 115.938 116.250 116.563 116.875 117.188 117.500 117.813 118.125 118.438 118.750 119.063 119.375 119.688 120.000 115.000 115.000 116.667 118.333 120.000 120.000 120.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 51 51 0 48 51 51 54 54 57 57 57 0 60 60 60 60 0 0 63 63 0 66 66 66 66 0 69 69 72 0 72 72 0 0 72 69 63 63 63 63 0 0 0 0 0 66 72 69 69 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 69 72 63 0 0 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
</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" >
89.488 90.0 95.0 100.0 105.0 110.0 111.679 113.357 115.0 115.036 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 337.629 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.26 2.907 3.25 3.359 3.236 3.236 3.356 3.359 3.548 3.748 3.956 4.172 4.393 4.618 4.846 5.076 5.306 5.536 5.766 5.995 6.222 6.448 6.672 6.894 7.115 7.334 7.551 7.767 7.981 8.194 8.405 8.614 8.821 9.027 9.231 9.433 9.633 9.83 10.025 10.215 10.402 10.583 10.759 10.927 11.085 11.233 11.368 11.486 11.586 11.664 11.718 11.746 11.75 11.749 11.74 11.723 11.698 11.665 11.625 11.578 11.524 11.464 11.398 11.326 11.249 11.167 11.081 10.99 10.895 10.797 10.695 10.59 10.482 10.372 10.259 10.144 10.027 9.909 9.789 9.668 9.545 9.422 9.298 9.174 9.049 8.923 8.798 8.672 8.547 8.422 8.297 8.173 8.049 7.925 7.803 7.681 7.559 7.439 7.32 7.201 7.084 6.968 6.853 6.739 6.626 6.514 6.404 6.295 6.187 6.081 5.976 5.872 5.77 5.668 5.569 5.47 5.374 5.278 5.184 5.091 5.0 4.91 4.821 4.734 4.648 4.563 4.48 4.398 4.317 4.238 4.16 4.083 4.008 3.934 3.861 3.789 3.718 3.649 3.581 3.514 3.448 3.384 3.32 3.258 3.197 3.136 3.077 3.019 2.962 2.906 2.851 2.797 2.744 2.692 2.641 2.591 2.542 2.493 2.446 2.399 2.353 2.309 2.265 2.221 2.179 2.137 2.096 2.056 2.017 1.978 1.94 1.903 1.867 1.831 1.796 1.761 1.727 1.694 1.662 1.63 1.599 1.568 1.538 1.508 1.479 1.451

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.359" PeakHeight="110.0" Num="3" Error="0.0">
-30.478 13.118 -3.152
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.359" EndFrequency="11.75" PeakHeight="337.629" Num="5" zHalfNm="227.717" Error="2.017">
-207.481 -25.246 13.977 -4.262 0.419
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.036" Depth="0.123"/>
<TopsideChapman PeakHeight="337.629" PeakDensity="1712934.2" PeakScaleHeight="79.948" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
