<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-07 -038 08:20:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</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" >
2026.02.07 (038) 08:20:00</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">
FF202603802070820009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.414" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.313" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="275.000" 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="0.399" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="279.761" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="226.730" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.095" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="74.899" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.214" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="40.319" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="60.750" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.780" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="81">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.95 2.0 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 220.000 219.000 218.000 217.000 216.000 215.000 220.000 215.000 216.667 218.333 220.000 225.000 226.667 228.333 230.000 230.000 230.000 240.000 230.000 230.000 225.000 225.000 227.500 230.000 232.500 235.000 235.000 235.000 236.000 237.000 238.000 239.000 240.000 240.000 240.000 240.000 240.000 242.000 244.000 246.000 248.000 250.000 250.000 250.000 251.667 253.333 255.000 255.000 255.000 255.000 260.000 265.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 271.667 273.333 275.000 275.000 285.000 295.000 299.500 304.697 310.763 317.939 326.559 337.107 350.313 367.326 390.069 422.022 470.201
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 0 60 0 0 57 60 57 0 0 60 60 0 0 60 0 0 0 60 63 63 54 0 0 0 60 63 69 0 63 0 0 72 0 75 0 66 0 48 0 0 57 60 69 0 0 63 69 51 63 69 54 60 51 60 75 66 0 66 72 0 81 66 0 0 72 75 57 69 63 51 54 51 51 51 0 54 66 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 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 -1.953125 -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 1.953125 -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 -0.390625 -0.390625 -0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="143">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.684 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 134.5 135.0 140.0 145.0 150.0 155.0 159.0 160.0 165.0 170.0 175.0 180.0 183.5 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 279.761 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.264 0.346 0.386 0.399 0.393 0.374 0.341 0.289 0.213 0.213 0.213 0.213 0.213 0.213 0.213 0.221 0.259 0.297 0.334 0.372 0.399 0.421 0.518 0.675 0.94 1.385 2.064 2.848 3.523 4.052 4.47 4.806 5.081 5.305 5.489 5.637 5.754 5.842 5.903 5.939 5.95 5.95 5.94 5.915 5.874 5.819 5.753 5.675 5.588 5.493 5.391 5.283 5.17 5.053 4.933 4.81 4.686 4.56 4.434 4.308 4.183 4.058 3.935 3.813 3.693 3.575 3.459 3.345 3.234 3.125 3.019 2.916 2.815 2.718 2.622 2.53 2.44 2.353 2.269 2.187 2.108 2.032 1.958 1.886 1.817 1.751 1.686 1.624 1.564 1.506 1.45 1.396 1.344 1.294 1.245 1.199 1.154 1.111 1.069 1.029 0.99 0.953 0.917 0.882 0.849 0.817 0.786 0.756 0.728 0.7 0.674 0.648 0.624 0.6 0.577 0.556 0.534 0.514 0.495 0.476 0.458 0.441 0.424 0.408 0.392 0.377 0.363 0.349 0.336 0.323 0.311 0.299 0.288 0.277 0.266 0.256 0.247 0.237 0.228 0.219 0.211 0.203

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.399" PeakHeight="110.0" Num="3" Error="0.0">
-20.189 3.089 -0.216
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.399" EndFrequency="5.95" PeakHeight="279.761" Num="5" zHalfNm="226.73" Error="3.053">
-120.302 38.957 -17.423 3.503 -0.996
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="73.5" Depth="0.186"/>
<TopsideChapman PeakHeight="279.761" PeakDensity="439236.97" PeakScaleHeight="40.319" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
