<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-31 -031 12:20:00.000"
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: 85% PACIFIC flags: Multiple candidates for F2x 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) 12:20:00</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">
FF202603101311220009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.522" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.827" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="400.000" 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="3.055" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.201" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="365.400" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="224.504" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.691" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="184.248" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="42.980" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="99.484" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="209.880" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.660" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="83">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 9.0 9.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 265.000 270.000 275.000 277.500 280.000 285.000 285.000 290.000 295.000 295.000 297.500 300.000 305.000 310.000 315.000 315.000 320.000 320.000 320.000 320.000 325.000 330.000 330.000 330.000 335.000 340.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 355.000 360.000 360.000 365.000 365.000 370.000 372.500 375.000 380.000 380.000 385.000 390.000 395.000 400.000 400.000 405.000 415.000 420.000 425.000 425.000 430.000 435.000 445.000 455.000 455.000 460.000 470.000 475.000 485.000 495.000 505.000 515.000 520.000 530.000 540.000 545.000 555.000 565.000 570.000 580.000 585.000 593.899 604.062 615.778 629.434 645.554 664.871 688.442
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 48 51 0 48 51 45 48 51 48 0 54 0 0 54 57 51 0 57 51 60 57 60 57 0 51 57 63 63 63 66 63 66 66 63 60 66 63 63 66 0 66 63 60 60 63 63 63 69 66 60 63 60 63 60 60 63 54 60 60 60 63 60 63 63 66 63 60 63 63 60 60 57 60 54 57 54 54 48 48 42 42
</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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625
</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" >
89.536 90.0 95.0 100.0 105.0 110.0 112.972 115.0 115.943 118.915 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 365.4 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.054 2.644 2.956 3.055 2.933 2.933 2.933 3.055 3.09 3.237 3.371 3.501 3.632 3.766 3.905 4.05 4.202 4.362 4.53 4.705 4.886 5.07 5.254 5.436 5.614 5.786 5.952 6.112 6.266 6.414 6.556 6.693 6.826 6.954 7.079 7.2 7.318 7.432 7.544 7.654 7.761 7.866 7.969 8.07 8.169 8.265 8.359 8.451 8.541 8.626 8.708 8.785 8.856 8.92 8.973 9.014 9.04 9.05 9.05 9.048 9.042 9.032 9.017 8.999 8.977 8.951 8.922 8.889 8.854 8.815 8.773 8.729 8.682 8.632 8.58 8.526 8.47 8.412 8.352 8.29 8.226 8.161 8.095 8.027 7.958 7.888 7.817 7.744 7.671 7.598 7.523 7.448 7.372 7.296 7.22 7.143 7.066 6.988 6.911 6.833 6.756 6.678 6.6 6.523 6.445 6.368 6.291 6.214 6.138 6.062 5.986 5.911 5.836 5.761 5.687 5.613 5.54 5.467 5.395 5.324 5.253 5.182 5.113 5.043 4.975 4.907 4.839 4.773 4.707 4.641 4.577 4.513 4.449 4.387 4.325 4.263 4.203 4.143 4.083 4.025 3.967 3.91 3.853 3.797 3.742 3.688 3.634 3.581 3.528 3.476 3.425 3.375 3.325 3.276 3.227 3.18 3.132 3.086 3.04 2.994 2.95 2.905 2.862 2.819 2.777 2.735 2.694 2.653 2.613 2.574 2.535 2.496 2.459 2.421 2.385 2.348 2.313 2.277 2.243 2.209 2.175 2.142 2.109 2.077 2.045 2.014

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.055" PeakHeight="110.0" Num="3" Error="0.0">
-30.241 12.769 -2.992
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.055" EndFrequency="9.05" PeakHeight="365.4" Num="5" zHalfNm="224.504" Error="7.053">
-232.45 -25.739 20.163 -13.183 4.724
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.915" Depth="0.122"/>
<TopsideChapman PeakHeight="365.4" PeakDensity="1016160.06" PeakScaleHeight="99.484" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
