<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-29 -088 00:50:00.000"
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="2 2 0 0 0 0 0 0 0 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: F2x cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o 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) 00:50:00</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">
FF202608803290050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.066" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.679" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" 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="0.700" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="376.429" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="357.311" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="334.108" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.125" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="35.276" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.710" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="18.626" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="46.520" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.010" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="111">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 353.750 352.500 351.250 350.000 350.000 355.000 355.000 355.000 355.000 370.000 385.000 390.000 370.000 371.667 373.333 375.000 370.000 366.667 363.333 360.000 360.000 370.000 365.000 365.000 360.000 360.000 350.000 365.000 357.500 350.000 350.000 352.500 355.000 360.000 360.000 360.000 362.500 365.000 365.000 362.500 360.000 360.000 360.000 355.000 355.000 355.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 351.667 353.333 355.000 355.000 360.000 362.500 365.000 365.000 365.000 365.000 365.000 360.000 355.000 355.000 355.000 355.000 357.500 360.000 360.000 355.000 360.000 357.500 355.000 360.000 360.000 360.000 357.500 355.000 355.000 355.000 357.500 360.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 367.500 370.000 370.000 372.143 374.286 376.429 379.860 384.124 389.565 396.747 406.668 421.260 444.840
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 0 0 60 54 57 57 60 60 0 57 51 60 0 0 54 57 0 0 60 57 57 54 54 54 57 66 51 0 63 63 0 63 60 0 60 0 57 51 0 60 51 63 63 0 57 66 63 60 69 66 66 60 0 0 57 66 60 0 0 48 51 60 54 0 66 69 72 72 0 60 60 66 60 60 66 63 66 60 0 75 69 63 0 69 72 69 60 63 69 63 66 66 66 60 0 60 0 63 63 60 60 66 60 60 57 60 54 51 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 -0.390625 -1.171875 0.390625 0.390625 -1.171875 -0.390625 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 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 1.171875 1.171875 0.390625 1.171875 -2.734375 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 1.171875 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 -1.171875 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 0.390625 0.390625 1.171875 1.171875 0.390625 1.171875 -2.734375 0.390625 1.171875 1.171875 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 1.171875 0.390625 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="108">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.809 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.618 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 220.427 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 357.311 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.333 0.316 0.293 0.262 0.219 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.206 0.227 0.248 0.269 0.289 0.31 0.331 0.352 0.354 0.414 0.531 0.692 0.849 0.996 1.138 1.279 1.421 1.566 1.718 1.876 2.044 2.223 2.416 2.626 2.856 3.113 3.401 3.731 4.117 4.577 5.139 5.823 6.598 7.306 7.793 8.025 8.05 8.034 7.928 7.738 7.484 7.181 6.846 6.49 6.124 5.755 5.39 5.035 4.691 4.362 4.049 3.753 3.474 3.213 2.969 2.741 2.529 2.332 2.15 1.981 1.825 1.681 1.547 1.424 1.311 1.206 1.11 1.021 0.939 0.864 0.795 0.731 0.672 0.618 0.569 0.523 0.481 0.442 0.407 0.374 0.344 0.316 0.291 0.268 0.246 0.226 0.208

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.05" PeakHeight="357.311" Num="5" zHalfNm="334.108" Error="5.846">
-109.714 -38.776 9.954 6.82 -5.168
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="110.427" Depth="0.154"/>
<TopsideChapman PeakHeight="357.311" PeakDensity="804001.25" PeakScaleHeight="18.626" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
