<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-01 -032 12:40:00.000"
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: 90% PACIFIC flags: 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" >
2026.02.01 (032) 12:40:00</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">
FF202603202011240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.683" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.012" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="410.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.129" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.237" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="330.861" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="215.661" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.067" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="150.382" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="35.647" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="83.906" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="179.170" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.590" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="54">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 340.000 340.000 345.000 345.000 346.667 348.333 350.000 350.000 355.000 355.000 357.500 360.000 360.000 360.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 382.500 385.000 385.000 390.000 395.000 397.500 400.000 400.000 405.000 410.000 410.000 415.000 420.000 425.000 430.000 435.000 440.000 445.000 450.000 460.000 465.000 470.000 480.000 485.000 493.899 504.062 515.778 529.434 545.554 564.871 588.442 617.846
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 45 45 48 0 0 45 45 48 48 0 51 48 45 51 48 51 51 48 54 51 0 54 54 54 48 0 51 54 54 54 54 54 57 54 54 57 54 54 54 51 54 51 51 48 51 54 51 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-2.734375 -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 -1.171875 -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 -1.953125 0.390625 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.524 90.0 95.0 100.0 105.0 110.0 112.649 115.0 115.297 117.946 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 330.861 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.104 2.708 3.027 3.129 3.007 3.007 3.007 3.129 3.195 3.357 3.522 3.688 3.855 4.022 4.19 4.358 4.525 4.692 4.858 5.023 5.187 5.35 5.513 5.674 5.834 5.993 6.151 6.308 6.464 6.618 6.772 6.923 7.074 7.223 7.37 7.514 7.657 7.796 7.932 8.065 8.192 8.314 8.43 8.537 8.636 8.724 8.8 8.862 8.908 8.938 8.95 8.95 8.948 8.94 8.926 8.907 8.882 8.852 8.818 8.779 8.735 8.688 8.636 8.581 8.522 8.46 8.396 8.328 8.257 8.185 8.11 8.033 7.953 7.873 7.79 7.707 7.622 7.535 7.448 7.36 7.271 7.182 7.092 7.002 6.911 6.82 6.729 6.638 6.547 6.456 6.365 6.275 6.185 6.095 6.005 5.917 5.828 5.74 5.653 5.567 5.481 5.396 5.311 5.228 5.145 5.063 4.982 4.901 4.822 4.743 4.666 4.589 4.513 4.438 4.365 4.292 4.22 4.148 4.078 4.009 3.941 3.874 3.807 3.742 3.678 3.614 3.552 3.49 3.429 3.37 3.311 3.253 3.196 3.14 3.084 3.03 2.977 2.924 2.872 2.821 2.771 2.722 2.673 2.626 2.579 2.533 2.487 2.443 2.399 2.356 2.313 2.272 2.231 2.191 2.151 2.112 2.074 2.036 2.0 1.963 1.928 1.893 1.858 1.825 1.792 1.759 1.727 1.696 1.665 1.634 1.605 1.575 1.547 1.518 1.491 1.463 1.437 1.41 1.385 1.359 1.334 1.31 1.286 1.262 1.239 1.217

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.129" PeakHeight="110.0" Num="3" Error="0.0">
-30.301 12.858 -3.033
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.129" EndFrequency="8.95" PeakHeight="330.861" Num="5" zHalfNm="215.661" Error="2.089">
-198.216 -23.328 10.81 -2.392 0.211
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.946" Depth="0.122"/>
<TopsideChapman PeakHeight="330.861" PeakDensity="993827.56" PeakScaleHeight="83.906" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
