<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 15:00:00.000"
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" >
2026.01.26 (026) 15:00:00</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">
FF202602601261500009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.304" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.387" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="375.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="375.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" 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="3.364" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.348" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="404.747" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="255.642" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.249" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="192.819" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="58.622" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="106.851" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="237.560" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.450" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="76">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 397.500 400.000 400.000 400.000 403.333 406.667 410.000 410.000 410.000 415.000 420.000 422.500 425.000 430.000 435.000 435.000 437.500 440.000 445.000 450.000 450.000 450.000 455.000 460.000 460.000 465.000 470.000 475.000 480.000 485.000 490.000 495.000 500.000 505.000 515.000 520.000 525.000 535.000 540.000 545.000 550.000 555.000 560.000 565.000 570.000 575.000 580.000 585.000 590.000 595.000 595.000 595.000 600.000 605.000 616.999 629.820 643.551 658.293 674.160 691.288 709.833 729.977 751.938
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 48 0 48 48 0 54 54 60 54 57 60 0 60 60 57 0 0 0 57 54 63 66 0 63 63 48 57 0 57 51 45 57 63 63 60 60 60 60 60 60 57 60 60 60 54 54 57 54 54 54 54 51 54 54 54 54 54 54 54 54 54 45 0 0 0 0 0 0 0 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 1.953125 2.734375 -0.390625 0.390625 -1.171875 -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" >
89.487 90.0 95.0 100.0 105.0 110.0 111.658 113.315 114.973 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 404.747 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.263 2.911 3.254 3.364 3.241 3.241 3.364 3.365 3.519 3.662 3.798 3.931 4.062 4.193 4.324 4.456 4.588 4.721 4.855 4.99 5.126 5.263 5.4 5.538 5.676 5.814 5.951 6.089 6.226 6.362 6.497 6.632 6.765 6.898 7.03 7.16 7.29 7.418 7.546 7.672 7.797 7.922 8.045 8.167 8.288 8.407 8.526 8.644 8.76 8.875 8.988 9.1 9.21 9.318 9.423 9.526 9.624 9.719 9.807 9.889 9.963 10.027 10.08 10.119 10.143 10.15 10.15 10.148 10.141 10.13 10.116 10.097 10.075 10.05 10.021 9.988 9.953 9.914 9.873 9.828 9.781 9.732 9.68 9.626 9.57 9.511 9.451 9.389 9.325 9.259 9.192 9.123 9.053 8.982 8.91 8.836 8.762 8.687 8.61 8.533 8.456 8.377 8.299 8.219 8.14 8.06 7.979 7.899 7.818 7.737 7.656 7.575 7.493 7.412 7.331 7.251 7.17 7.089 7.009 6.929 6.85 6.77 6.691 6.612 6.534 6.456 6.379 6.302 6.226 6.15 6.074 5.999 5.925 5.851 5.778 5.705 5.633 5.562 5.491 5.421 5.351 5.282 5.214 5.146 5.079 5.013 4.947 4.882 4.818 4.754 4.691 4.628 4.567 4.506 4.445 4.385 4.326 4.268 4.21 4.153 4.097 4.041 3.986 3.932 3.878 3.825 3.772 3.72 3.669 3.618 3.568 3.519 3.47 3.422 3.374 3.327 3.281 3.235 3.19 3.146 3.102 3.058 3.015 2.973 2.931 2.89

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.364" PeakHeight="110.0" Num="3" Error="0.0">
-30.482 13.123 -3.154
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.364" EndFrequency="10.15" PeakHeight="404.747" Num="5" zHalfNm="255.642" Error="5.225">
-261.012 -46.235 22.229 -7.031 2.275
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.973" Depth="0.123"/>
<TopsideChapman PeakHeight="404.747" PeakDensity="1278194.8" PeakScaleHeight="106.851" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
