<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-31 -031 22:20:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, 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" >
2026.01.31 (031) 22:20:00</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">
FF202603101312220009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.270" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.933" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="500.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="500.000" 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="0.550" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="590.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="503.875" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="407.985" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.780" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="140.697" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="23.677" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="71.669" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="142.240" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.880" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="48">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
500.000 505.000 505.000 510.000 510.000 510.000 510.000 515.000 515.000 515.000 520.000 520.000 525.000 525.000 530.000 535.000 535.000 540.000 540.000 545.000 545.000 545.000 547.500 550.000 550.000 557.500 565.000 570.000 575.000 570.000 572.500 575.000 577.500 580.000 582.500 585.000 587.500 590.000 597.500 605.000 610.066 616.362 624.398 635.010 649.673 671.256 706.167 772.270
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 69 66 72 0 72 72 75 69 69 72 66 69 0 54 63 69 75 69 63 72 69 78 69 0 75 69 72 69 60 69 72 72 0 0 0 60 0 66 72 72 69 66 60 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 1.171875 1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 1.953125 -0.390625
</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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 140.99 145.0 150.0 155.0 160.0 165.0 170.0 171.979 175.0 180.0 185.0 190.0 195.0 200.0 202.969 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 503.875 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.325 0.3 0.264 0.213 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.215 0.24 0.265 0.29 0.314 0.339 0.354 0.371 0.415 0.461 0.51 0.562 0.618 0.678 0.743 0.812 0.887 0.967 1.053 1.145 1.242 1.346 1.456 1.571 1.692 1.818 1.95 2.086 2.228 2.374 2.523 2.677 2.835 2.996 3.16 3.327 3.497 3.67 3.844 4.021 4.2 4.38 4.562 4.744 4.927 5.111 5.294 5.477 5.659 5.84 6.019 6.195 6.368 6.536 6.7 6.858 7.009 7.151 7.285 7.409 7.521 7.621 7.707 7.778 7.834 7.873 7.895 7.9 7.9 7.894 7.882 7.863 7.837 7.805 7.768 7.725 7.677 7.624 7.567 7.506 7.44 7.372 7.3 7.225 7.147 7.067 6.984 6.9 6.814 6.726 6.637 6.546 6.455 6.363 6.27 6.177 6.083 5.989 5.895 5.801 5.707 5.613 5.519 5.426 5.334 5.242 5.15 5.06 4.97 4.88 4.792 4.705 4.618 4.533 4.448 4.364 4.282 4.201 4.12 4.041 3.963 3.886 3.81 3.735 3.662 3.59 3.518 3.448 3.379 3.312 3.245 3.179 3.115 3.052 2.99 2.929 2.869 2.81 2.752 2.696 2.64 2.585 2.532 2.479 2.428 2.377 2.328 2.279 2.232 2.185 2.139 2.094 2.05 2.007 1.965 1.923 1.883 1.843 1.804 1.766 1.728 1.692 1.656 1.621 1.586 1.553 1.52 1.487

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="7.9" PeakHeight="503.875" Num="5" zHalfNm="407.985" Error="2.601">
-295.132 -12.706 10.201 -5.014 1.745
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="92.969" Depth="0.154"/>
<TopsideChapman PeakHeight="503.875" PeakDensity="774317.6" PeakScaleHeight="71.669" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
