<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-29 -088 21:10:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.03.29 (088) 21:10:00</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">
FF202608803292110009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="9.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.145" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.780" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.100" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="285.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="285.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="120.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="381.849" 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="0.953" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="313.524" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="277.812" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.372" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.050" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="52.638" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="12.638" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="26.778" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="66.500" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="3.250" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="119">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 290.000 290.000 290.000 285.000 285.000 290.000 290.000 290.000 285.000 285.000 287.000 289.000 291.000 293.000 295.000 295.000 295.455 295.909 296.364 296.818 297.273 297.727 298.182 298.636 299.091 299.545 300.000 305.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 305.000 305.000 307.500 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 317.500 320.000 320.833 321.667 322.500 323.333 324.167 325.000 325.000 327.500 330.000 325.000 325.000 325.000 330.000 335.000 330.000 330.000 330.000 332.500 335.000 335.000 335.833 336.667 337.500 338.333 339.167 340.000 340.833 341.667 342.500 343.333 344.167 345.000 345.000 345.000 345.000 347.500 350.000 350.000 355.000 355.000 355.000 355.000 355.000 355.000 360.000 362.500 365.000 365.000 365.000 365.000 365.000 365.000 365.000 366.667 368.333 370.000 375.000 375.419 375.959 376.682 377.701 379.242 381.849 387.204 404.511
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 54 0 57 54 60 66 69 66 66 51 0 0 0 0 54 51 0 69 0 66 0 0 0 0 0 0 63 54 0 0 60 0 69 72 72 72 72 69 69 72 0 75 75 63 0 0 66 69 0 54 78 72 78 0 60 0 0 0 66 66 0 57 72 66 0 0 0 69 0 54 0 63 66 0 0 0 0 0 0 63 0 0 0 0 63 63 60 63 0 69 69 69 72 0 69 66 69 57 0 54 57 51 54 0 60 57 0 0 57 45 0 51 54 60 66 69 60 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 -2.734375 -0.390625 -0.390625 0.390625 -0.390625 -1.171875 1.171875 -0.390625 -0.390625 -0.390625 -1.171875 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="62">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 115.000 112.500 110.000 110.000 111.000 112.000 113.000 114.000 115.000 115.000 115.000 115.000 115.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 111.667 113.333 115.000 115.000 115.000 115.000 120.000 120.238 120.476 120.714 120.952 121.190 121.429 121.667 121.905 122.143 122.381 122.619 122.857 123.095 123.333 123.571 123.810 124.048 124.286 124.524 124.762 125.000 125.000 125.000 130.000 129.167 128.333 127.500 126.667 125.833 125.000 120.000 122.500 125.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 69 0 69 69 0 0 0 0 72 0 0 0 69 72 72 0 78 0 0 78 78 0 0 72 75 75 69 63 0 0 0 0 0 0 57 57 0 51 54 0 0 0 0 57 0 0 0 0 54 0 0 51 0 0 0 0 0 54 51 0 54
</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 1.171875 0.390625 -0.390625 0.390625 1.171875 0.390625 1.171875 0.390625 0.390625 0.390625 1.171875 1.171875 0.390625 1.171875 0.390625 1.171875 1.953125 1.171875 0.390625 -0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="123">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.324 95.0 100.0 105.0 110.0 115.0 120.0 125.0 128.114 130.0 135.0 140.0 145.0 146.228 150.0 155.0 160.0 164.342 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 313.524 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.634 0.826 0.923 0.953 0.937 0.888 0.799 0.719 0.719 0.719 0.719 0.719 0.719 0.768 0.832 0.897 0.953 0.981 1.173 1.349 1.521 1.693 1.869 2.048 2.233 2.424 2.623 2.83 3.045 3.27 3.505 3.752 4.011 4.282 4.568 4.869 5.187 5.522 5.876 6.25 6.646 7.062 7.499 7.948 8.395 8.8 9.083 9.15 9.147 9.1 9.001 8.856 8.673 8.459 8.22 7.962 7.689 7.407 7.118 6.827 6.536 6.246 5.962 5.682 5.41 5.146 4.89 4.643 4.405 4.177 3.958 3.749 3.549 3.359 3.178 3.005 2.841 2.686 2.538 2.398 2.265 2.14 2.021 1.908 1.802 1.701 1.606 1.516 1.43 1.35 1.274 1.202 1.135 1.071 1.01 0.953 0.899 0.849 0.801 0.755 0.713 0.672 0.634 0.598 0.565 0.533 0.502 0.474 0.447 0.422 0.398 0.375 0.354 0.334 0.315 0.297 0.28 0.265 0.25 0.235 0.222 0.209

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.953" PeakHeight="110.0" Num="3" Error="0.0">
-26.289 7.774 -1.161
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.953" EndFrequency="9.15" PeakHeight="313.524" Num="5" zHalfNm="277.812" Error="1.687">
-120.275 -43.408 15.031 -0.586 0.056
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="54.342" Depth="0.234"/>
<TopsideChapman PeakHeight="313.524" PeakDensity="1038740.7" PeakScaleHeight="26.778" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
