<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-30 -030 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" >
2026.01.30 (030) 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">
FF202603001300900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="4.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.132" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.504" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.300" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="327.120" 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="1.008" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="303.864" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="225.704" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.494" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="111.912" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.756" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.281" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="83.970" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="5.490" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="50">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 250.000 250.000 250.000 250.000 250.000 252.000 254.000 256.000 258.000 260.000 260.000 260.000 262.500 265.000 270.000 270.000 270.000 270.000 275.000 275.000 280.000 280.000 280.000 285.000 285.000 285.000 290.000 290.000 290.000 295.000 300.000 300.000 303.360 307.084 311.234 315.887 321.141 327.120 333.987 341.952 351.305 362.442 375.926 392.588 413.701 441.324 479.015 533.507
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 66 78 75 0 78 75 0 0 0 0 72 72 75 0 72 60 66 72 75 66 72 57 66 69 57 63 66 63 63 57 0 63 66 69 69 69 69 69 63 63 60 60 60 60 0 54 60 54 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 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 1.953125 1.953125 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.262 95.0 100.0 105.0 110.0 115.0 120.0 125.0 126.768 130.0 135.0 140.0 143.535 145.0 150.0 155.0 160.0 160.303 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 303.864 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.671 0.873 0.976 1.008 0.991 0.939 0.845 0.8 0.8 0.8 0.8 0.8 0.818 0.88 0.942 1.004 1.008 1.101 1.223 1.368 1.528 1.699 1.879 2.069 2.27 2.486 2.717 2.962 3.215 3.466 3.701 3.913 4.097 4.255 4.39 4.504 4.601 4.683 4.752 4.809 4.855 4.891 4.919 4.937 4.948 4.95 4.95 4.945 4.935 4.918 4.897 4.87 4.839 4.803 4.763 4.72 4.673 4.623 4.57 4.515 4.458 4.398 4.336 4.274 4.209 4.144 4.077 4.01 3.942 3.874 3.805 3.736 3.667 3.598 3.529 3.461 3.393 3.325 3.258 3.191 3.125 3.059 2.995 2.931 2.868 2.805 2.744 2.683 2.624 2.565 2.508 2.451 2.395 2.34 2.286 2.234 2.182 2.131 2.081 2.032 1.984 1.937 1.891 1.846 1.802 1.759 1.717 1.676 1.635 1.596 1.557 1.519 1.482 1.446 1.411 1.377 1.343 1.31 1.278 1.247 1.216 1.186 1.157 1.128 1.1 1.073 1.046 1.021 0.995 0.971 0.946 0.923 0.9 0.878 0.856 0.834 0.814 0.793 0.774 0.754 0.735 0.717 0.699 0.682 0.665 0.648 0.632 0.616 0.601 0.586 0.571 0.557 0.543 0.529 0.516 0.503 0.49 0.478 0.466 0.454 0.443 0.432 0.421 0.41 0.4 0.39 0.38 0.371 0.361 0.352 0.343 0.335 0.326 0.318 0.31 0.302 0.295 0.287 0.28 0.273 0.266 0.259 0.253 0.247 0.24 0.234

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.008" PeakHeight="110.0" Num="3" Error="0.0">
-26.54 8.034 -1.232
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.008" EndFrequency="4.95" PeakHeight="303.864" Num="5" zHalfNm="225.704" Error="2.52">
-163.135 32.124 -16.953 6.356 -1.953
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="50.303" Depth="0.208"/>
<TopsideChapman PeakHeight="303.864" PeakDensity="304001.25" PeakScaleHeight="61.281" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
