<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-20 -079 00:10:00.000"
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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match, Unidentified traces above foF2, Trace overlaps while constructing baseline</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" >
2026.03.20 (079) 00:10:00</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">
FF202607903200010009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.198" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.747" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" 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="1.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="345.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="373.447" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="343.427" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.436" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="46.400" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.274" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="22.599" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="57.200" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="101">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
385.000 385.000 380.000 377.778 375.556 373.333 371.111 368.889 366.667 364.444 362.222 360.000 355.000 355.000 355.000 360.000 365.000 370.000 375.000 375.000 373.333 371.667 370.000 369.167 368.333 367.500 366.667 365.833 365.000 365.000 365.000 365.000 367.500 370.000 370.800 371.600 372.400 373.200 374.000 374.800 375.600 376.400 377.200 378.000 378.800 379.600 380.400 381.200 382.000 382.800 383.600 384.400 385.200 386.000 386.800 387.600 388.400 389.200 390.000 388.333 386.667 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 390.000 395.000 400.000 405.000 415.000 415.000 420.000 425.000 429.000 433.000 437.000 441.000 445.000 449.000 453.000 457.000 461.000 465.000 345.000 365.000 380.000 389.388 400.644 414.388 431.546 453.573 482.881
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 60 0 63 57 57 0 0 0 0 54 60 0 54 0 0 0 54 0 0 0 60 0 0 60 0 0 54 57 57 54 0 54 0 0 0 0 48 0 51 0 54 0 0 0 0 51 51 0 57 54 57 0 0 0 60 57 60 0 0 54 63 0 57 0 63 60 0 57 66 60 0 57 57 0 54 54 51 54 0 51 51 0 0 48 0 0 0 0 0 0 54 48 54 54 57 57 51 54 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 1.171875 -1.171875 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -1.171875 -0.390625 -0.390625 0.390625 -0.390625 -1.171875 -1.171875 -0.390625 1.953125 -0.390625 0.390625 -0.390625 -1.171875 0.390625 -1.171875 0.390625 2.734375 2.734375 1.953125 -0.390625 -0.390625 1.171875 -0.390625 0.390625 -0.390625 -1.171875 2.734375 -0.390625 1.953125 -0.390625 1.171875 -0.390625 0.390625 0.390625 -0.390625 1.953125 -0.390625 -0.390625 1.953125 0.390625 -0.390625 -0.390625 -1.171875 2.734375 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -1.171875 -0.390625 -1.953125 -0.390625 -0.390625 -1.171875 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -1.171875 -0.390625 2.734375 0.390625 0.390625 2.734375 -2.734375 0.390625 2.734375 2.734375 -0.390625 1.953125 1.171875 2.734375 1.953125 -0.390625 0.390625 -0.390625 0.390625 -1.171875 -1.953125 -0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="122">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.06 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.121 185.0 190.0 195.0 200.0 205.0 210.0 215.0 218.181 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 373.447 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0
</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 0.315 0.29 0.257 0.212 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.212 0.234 0.255 0.276 0.298 0.319 0.34 0.354 0.38 0.472 0.593 0.732 0.878 1.028 1.182 1.338 1.5 1.666 1.838 2.017 2.203 2.398 2.602 2.816 3.042 3.28 3.532 3.798 4.082 4.384 4.706 5.052 5.422 5.821 6.247 6.701 7.173 7.626 7.967 8.05 8.046 7.988 7.867 7.694 7.479 7.233 6.962 6.674 6.377 6.074 5.77 5.469 5.173 4.884 4.605 4.336 4.078 3.831 3.596 3.373 3.162 2.962 2.774 2.596 2.429 2.272 2.124 1.986 1.856 1.734 1.62 1.513 1.413 1.32 1.233 1.151 1.074 1.003 0.936 0.874 0.816 0.762 0.711 0.664 0.619 0.578 0.54 0.504 0.47 0.439 0.409 0.382 0.356 0.333 0.31 0.29 0.27 0.252 0.235 0.22 0.205

</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="373.447" Num="5" zHalfNm="343.427" Error="5.422">
-128.792 -44.479 22.647 -3.643 -0.999
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="108.181" Depth="0.154"/>
<TopsideChapman PeakHeight="373.447" PeakDensity="804001.25" PeakScaleHeight="22.599" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
