<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-04 -035 09:00:00.000"
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" >
2026.02.04 (035) 09:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603502040900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="4.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.245" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.900" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.200" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="307.325" 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="0.988" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="288.491" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="224.999" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.294" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="91.243" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.312" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="50.464" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="76.130" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.010" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="55">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 245.000 245.833 246.667 247.500 248.333 249.167 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 251.250 252.500 253.750 255.000 260.000 255.000 270.000 270.000 270.000 270.000 270.000 270.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 285.000 290.000 290.000 290.000 292.652 295.635 299.014 302.874 307.325 312.515 318.643 325.990 334.960 346.157 360.528 379.646 406.327 446.167 512.084
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 63 63 0 0 0 0 0 69 69 72 72 69 69 66 60 0 0 0 0 60 72 54 63 66 66 63 69 69 57 54 63 0 66 66 60 63 63 63 69 69 60 72 69 66 0 0 0 0 63 66 54 60 57 48
</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 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 -1.953125 1.171875 -2.734375 1.171875 1.171875 1.953125 1.171875 1.953125 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="164">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.283 95.0 100.0 105.0 110.0 115.0 120.0 125.0 127.22 130.0 135.0 140.0 144.441 145.0 150.0 155.0 160.0 161.661 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 288.491 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.658 0.856 0.956 0.988 0.971 0.92 0.828 0.771 0.771 0.771 0.771 0.771 0.778 0.841 0.904 0.967 0.988 1.068 1.21 1.368 1.53 1.695 1.865 2.041 2.229 2.433 2.657 2.905 3.178 3.465 3.743 3.991 4.197 4.365 4.501 4.61 4.697 4.765 4.818 4.857 4.883 4.897 4.9 4.9 4.892 4.876 4.852 4.821 4.783 4.738 4.688 4.633 4.573 4.509 4.441 4.371 4.297 4.221 4.144 4.064 3.984 3.902 3.82 3.737 3.655 3.572 3.489 3.407 3.325 3.244 3.164 3.084 3.006 2.928 2.852 2.777 2.703 2.631 2.56 2.49 2.422 2.355 2.29 2.226 2.163 2.102 2.043 1.984 1.928 1.872 1.818 1.766 1.714 1.665 1.616 1.569 1.523 1.478 1.434 1.392 1.351 1.311 1.272 1.234 1.197 1.161 1.127 1.093 1.06 1.029 0.998 0.968 0.939 0.91 0.883 0.856 0.831 0.805 0.781 0.758 0.735 0.712 0.691 0.67 0.65 0.63 0.611 0.592 0.574 0.557 0.54 0.524 0.508 0.492 0.477 0.463 0.449 0.435 0.422 0.409 0.397 0.385 0.373 0.362 0.351 0.34 0.33 0.319 0.31 0.3 0.291 0.282 0.274 0.265 0.257 0.249 0.242 0.235 0.227 0.22 0.214 0.207 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.988" PeakHeight="110.0" Num="3" Error="0.0">
-26.452 7.941 -1.206
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.988" EndFrequency="4.9" PeakHeight="288.491" Num="5" zHalfNm="224.999" Error="3.038">
-138.686 21.144 -14.66 7.557 -2.185
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="51.661" Depth="0.217"/>
<TopsideChapman PeakHeight="288.491" PeakDensity="297890.8" PeakScaleHeight="50.464" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
