<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-02 -033 01:00:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: Moderate F-spread, F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.02.02 (033) 01:00:00</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">
FF202603302020100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.547" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.878" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="315.000" 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="3.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="294.490" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="284.408" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.229" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="16.157" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.084" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="10.583" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="24.740" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="132">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 290.000 285.000 280.000 280.000 280.000 275.000 275.000 277.500 280.000 275.000 275.000 285.000 287.500 290.000 290.000 300.000 310.000 300.000 305.000 305.000 305.000 304.836 304.672 304.508 304.344 304.180 304.016 303.852 303.689 303.525 303.361 303.197 303.033 302.869 302.705 302.541 302.377 302.213 302.049 301.885 301.721 301.557 301.393 301.230 301.066 300.902 300.738 300.574 300.410 300.246 300.082 299.918 299.754 299.590 299.426 299.262 299.098 298.934 298.770 298.607 298.443 298.279 298.115 297.951 297.787 297.623 297.459 297.295 297.131 296.967 296.803 296.639 296.475 296.311 296.148 295.984 295.820 295.656 295.492 295.328 295.164 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 300.000 295.000 300.000 300.000 302.500 305.000 305.000 305.000 310.000 307.500 305.000 305.000 302.500 300.000 295.000 305.000 305.000 305.000 305.000 305.357 305.714 306.071 306.429 306.786 307.143 307.500 307.857 308.214 308.571 308.929 309.286 309.643 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 60 60 57 54 60 60 60 0 60 0 57 66 0 57 60 60 51 51 48 0 51 0 0 0 0 0 0 0 60 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 54 0 0 0 0 57 0 0 54 60 60 54 0 60 0 57 0 0 0 0 0 51 60 54 60 57 51 57 54 57 54 0 57 54 0 57 57 57 54 0 48 51 0 51 0 0 54 57 57 54 60 57 54 54 48 51 0 45 51 48 0 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.953125 1.953125 1.953125 0.390625 1.953125 0.390625 1.171875 0.390625 1.171875 1.953125 1.171875 1.171875 2.734375 0.390625 2.734375 2.734375 1.953125 1.953125 1.953125 2.734375 1.953125 0.390625 1.171875 1.171875 1.171875 1.953125 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 2.734375 0.390625 0.390625 2.734375 1.953125 -2.734375 1.171875 1.171875 0.390625 1.953125 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.953125 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 -1.953125 1.171875 -2.734375 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 0.390625 1.171875 1.171875 1.953125 1.171875 1.171875 1.171875 1.953125 1.953125 1.171875 1.171875 1.953125 1.953125 1.171875 0.390625 1.171875 1.171875 1.953125 1.953125 1.953125 1.953125 2.734375 1.171875 1.171875 1.953125 1.171875 1.953125 1.171875 1.171875 1.171875 0.390625 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="75">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.52 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.039 185.0 190.0 195.0 200.0 205.0 210.0 215.0 219.559 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 294.49 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0
</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 0.292 0.26 0.216 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.208 0.229 0.25 0.272 0.293 0.314 0.335 0.354 0.367 0.632 0.954 1.259 1.568 1.894 2.247 2.639 3.079 3.584 4.175 4.884 5.764 6.906 8.431 9.55 9.548 9.325 8.823 8.154 7.404 6.635 5.889 5.189 4.548 3.97 3.455 3.0 2.601 2.252 1.948 1.684 1.455 1.257 1.085 0.937 0.808 0.698 0.602 0.52 0.448 0.387 0.334 0.288 0.248 0.214

</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="9.55" PeakHeight="294.49" Num="5" zHalfNm="284.408" Error="2.511">
-57.61 -28.138 12.106 0.143 -1.432
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="109.559" Depth="0.154"/>
<TopsideChapman PeakHeight="294.49" PeakDensity="1131544.6" PeakScaleHeight="10.583" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
