<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-01 -032 19:00:00.000"
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: 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) 19:00:00</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">
FF202603202011900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.383" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.090" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="405.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="405.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="555.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.766" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="404.312" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="291.187" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.597" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="148.494" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="53.050" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="80.487" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="199.670" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.110" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="88">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
405.000 410.000 412.500 415.000 415.000 415.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 430.000 430.000 435.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 460.000 465.000 470.000 470.000 475.000 475.000 480.000 480.000 485.000 485.000 490.000 490.000 495.000 500.000 500.000 495.000 498.333 501.667 505.000 505.000 510.000 510.000 510.000 510.000 515.000 515.000 515.000 515.000 520.000 520.000 520.000 525.000 525.000 530.000 530.000 535.000 535.000 535.000 540.000 542.500 545.000 550.000 552.500 555.000 555.000 555.000 565.000 570.000 575.000 580.000 585.000 591.421 598.646 606.837 616.202 627.011 639.628 654.547
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 48 0 45 54 60 63 66 69 69 63 66 66 63 66 60 63 54 60 66 60 66 60 66 57 63 57 63 57 63 63 66 60 66 60 63 57 63 60 63 60 63 60 48 57 63 0 0 63 57 60 60 60 57 60 57 60 57 60 60 57 54 57 57 54 54 57 57 57 45 54 45 0 45 51 48 48 48 48 45 45 42 42 42 0 0 0 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 -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 2.734375 0.390625 2.734375 1.953125 -0.390625 -2.734375 -2.734375
</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" >
89.587 90.0 95.0 100.0 105.0 110.0 114.291 115.0 118.583 120.0 122.874 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 404.312 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.858 2.394 2.676 2.766 2.644 2.644 2.644 2.684 2.766 2.826 2.976 3.133 3.296 3.462 3.628 3.793 3.957 4.118 4.276 4.431 4.585 4.736 4.885 5.032 5.177 5.321 5.464 5.606 5.747 5.887 6.027 6.166 6.305 6.444 6.583 6.722 6.861 7.001 7.141 7.282 7.423 7.566 7.709 7.853 7.998 8.144 8.292 8.441 8.591 8.743 8.896 9.051 9.208 9.366 9.526 9.688 9.85 10.012 10.174 10.334 10.488 10.633 10.762 10.865 10.931 10.95 10.95 10.945 10.932 10.911 10.883 10.848 10.807 10.76 10.706 10.647 10.583 10.513 10.44 10.361 10.279 10.193 10.103 10.01 9.914 9.816 9.715 9.611 9.506 9.398 9.29 9.179 9.067 8.955 8.841 8.727 8.612 8.496 8.38 8.264 8.148 8.032 7.916 7.8 7.685 7.57 7.455 7.341 7.228 7.115 7.003 6.892 6.782 6.673 6.565 6.457 6.351 6.246 6.142 6.039 5.937 5.837 5.737 5.639 5.542 5.446 5.352 5.259 5.167 5.076 4.987 4.899 4.812 4.726 4.642 4.559 4.477 4.396 4.317 4.239 4.162 4.086 4.012 3.939 3.867 3.796 3.726 3.658 3.59 3.524 3.459 3.395 3.332 3.27 3.209 3.149 3.091 3.033 2.976 2.921 2.866 2.812 2.759 2.708 2.657 2.607 2.558 2.51 2.462 2.416 2.37 2.325 2.281 2.238 2.196 2.154 2.113 2.073 2.034 1.995 1.957 1.92 1.884 1.848 1.813 1.778

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.766" PeakHeight="110.0" Num="3" Error="0.0">
-29.986 12.398 -2.825
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.766" EndFrequency="10.95" PeakHeight="404.312" Num="5" zHalfNm="291.187" Error="2.06">
-236.647 -73.349 35.904 -7.069 -0.277
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.874" Depth="0.122"/>
<TopsideChapman PeakHeight="404.312" PeakDensity="1487624.1" PeakScaleHeight="80.487" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
