<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 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" >
2026.01.29 (029) 09:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202602901290900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.178" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.866" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" 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="5.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="315.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.013" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="289.511" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="227.867" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.494" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="87.706" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="9.653" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="47.394" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="81.670" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.790" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="71">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.0 6.05 6.1 6.15 6.2 6.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 240.000 240.000 240.000 240.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 255.000 256.250 257.500 258.750 260.000 261.000 262.000 263.000 264.000 265.000 270.000 270.000 271.250 272.500 273.750 275.000 275.000 280.000 285.000 285.000 285.000 287.500 290.000 290.000 295.000 295.000 295.000 300.000 301.250 302.500 303.750 305.000 305.000 310.000 315.000 315.000 320.000 325.000 330.000 340.000 340.000 350.000 355.000 364.051 376.000 392.507 416.793 456.052 530.299
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 66 66 66 66 69 0 0 69 69 69 69 0 54 0 0 69 66 63 0 0 0 66 0 63 0 63 0 69 0 0 0 63 69 0 63 0 72 69 63 51 57 63 0 54 63 48 0 63 54 0 0 0 66 57 69 75 75 69 69 63 66 69 75 69 72 69 69 66 66 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 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 1.953125 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 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" >
90.257 95.0 100.0 105.0 110.0 115.0 120.0 125.0 126.666 130.0 135.0 140.0 143.333 145.0 150.0 155.0 159.999 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 289.511 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.674 0.878 0.981 1.013 0.996 0.943 0.849 0.806 0.806 0.806 0.806 0.806 0.827 0.889 0.951 1.013 1.013 1.161 1.328 1.509 1.706 1.917 2.144 2.39 2.656 2.943 3.25 3.573 3.905 4.235 4.552 4.847 5.113 5.348 5.552 5.726 5.873 5.993 6.089 6.162 6.212 6.242 6.25 6.25 6.242 6.222 6.189 6.146 6.094 6.032 5.962 5.885 5.802 5.713 5.619 5.521 5.419 5.314 5.207 5.098 4.988 4.876 4.764 4.651 4.539 4.426 4.315 4.204 4.094 3.986 3.879 3.773 3.669 3.567 3.466 3.367 3.271 3.176 3.083 2.993 2.904 2.818 2.734 2.651 2.571 2.493 2.417 2.343 2.271 2.201 2.133 2.067 2.002 1.94 1.879 1.82 1.763 1.707 1.653 1.601 1.551 1.501 1.454 1.407 1.363 1.319 1.277 1.236 1.197 1.158 1.121 1.085 1.051 1.017 0.984 0.952 0.922 0.892 0.863 0.836 0.809 0.783 0.757 0.733 0.709 0.686 0.664 0.643 0.622 0.602 0.582 0.564 0.545 0.528 0.511 0.494 0.478 0.463 0.448 0.433 0.419 0.406 0.392 0.38 0.367 0.356 0.344 0.333 0.322 0.312 0.302 0.292 0.282 0.273 0.264 0.256 0.247 0.239 0.232 0.224 0.217 0.21 0.203

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.013" PeakHeight="110.0" Num="3" Error="0.0">
-26.562 8.058 -1.239
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.013" EndFrequency="6.25" PeakHeight="289.511" Num="5" zHalfNm="227.867" Error="1.998">
-138.095 14.501 -8.611 3.452 -0.759
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="49.999" Depth="0.207"/>
<TopsideChapman PeakHeight="289.511" PeakDensity="484646.4" PeakScaleHeight="47.394" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
