<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-07 -038 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: 100%</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) 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">
FF202603802070900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.365" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.516" 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="6.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="5.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="302.180" 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="0.979" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="264.814" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="215.486" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.294" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="69.936" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.631" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="37.554" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="66.250" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.600" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="66">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 230.000 228.333 226.667 225.000 225.000 225.000 225.000 225.000 225.000 225.000 230.000 230.000 231.667 233.333 235.000 235.000 235.000 235.000 237.500 240.000 242.500 245.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 251.000 252.000 253.000 254.000 255.000 255.000 260.000 260.000 265.000 265.000 265.000 270.000 270.000 270.000 275.000 275.000 275.000 280.000 280.000 285.000 285.000 290.000 295.000 297.028 299.391 302.180 305.522 309.598 314.680 321.195 329.846 341.889 359.809 389.294 446.873
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 51 0 0 66 66 0 66 0 0 48 63 66 0 0 63 66 0 60 0 0 0 57 0 57 60 0 60 60 54 57 0 0 0 0 66 0 69 72 63 69 72 63 66 69 63 66 66 63 63 60 66 66 66 69 69 0 69 69 63 66 66 66 0 51 54
</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 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 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 1.171875 1.171875 1.171875 1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="132">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.293 95.0 100.0 105.0 110.0 115.0 120.0 125.0 127.439 130.0 135.0 140.0 144.877 145.0 150.0 155.0 160.0 162.316 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 264.814 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.652 0.848 0.948 0.979 0.963 0.912 0.821 0.758 0.758 0.758 0.758 0.758 0.76 0.823 0.886 0.95 0.979 1.068 1.254 1.469 1.712 1.985 2.288 2.62 2.974 3.342 3.711 4.068 4.4 4.701 4.966 5.194 5.383 5.536 5.653 5.736 5.785 5.8 5.8 5.79 5.761 5.715 5.655 5.582 5.497 5.401 5.298 5.187 5.07 4.948 4.823 4.695 4.565 4.433 4.301 4.17 4.039 3.909 3.78 3.654 3.529 3.407 3.287 3.171 3.056 2.945 2.837 2.732 2.63 2.531 2.435 2.343 2.253 2.166 2.082 2.002 1.924 1.848 1.776 1.706 1.638 1.573 1.511 1.451 1.393 1.338 1.284 1.233 1.183 1.136 1.09 1.046 1.004 0.963 0.925 0.887 0.851 0.817 0.784 0.752 0.722 0.692 0.664 0.637 0.612 0.587 0.563 0.54 0.518 0.497 0.477 0.457 0.439 0.421 0.404 0.387 0.372 0.357 0.342 0.328 0.315 0.302 0.29 0.278 0.267 0.256 0.245 0.235 0.226 0.217 0.208

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.979" PeakHeight="110.0" Num="3" Error="0.0">
-26.411 7.899 -1.195
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.979" EndFrequency="5.8" PeakHeight="264.814" Num="5" zHalfNm="215.486" Error="1.151">
-108.446 9.823 -4.955 1.316 -0.236
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="52.316" Depth="0.221"/>
<TopsideChapman PeakHeight="264.814" PeakDensity="417369.72" PeakScaleHeight="37.554" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
