<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-05 -036 14:00:00.000"
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 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" >
2026.02.05 (036) 14:00:00</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">
FF202603602051400009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.291" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.622" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" 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="7.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="520.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.326" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.331" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="389.596" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="240.925" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.257" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="183.394" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.366" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="102.286" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="242.100" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.290" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="77">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 300.000 305.000 310.000 315.000 320.000 325.000 330.000 335.000 340.000 345.000 350.000 355.000 359.167 363.333 367.500 371.667 375.833 380.000 380.000 385.000 385.000 390.000 395.000 395.000 400.000 400.000 405.000 410.000 415.000 420.000 422.500 425.000 430.000 435.000 440.000 440.000 440.000 445.000 450.000 455.000 460.000 465.000 475.000 475.000 480.000 485.000 495.000 500.000 505.000 505.000 510.000 515.000 520.000 530.000 535.000 540.000 550.000 555.000 565.000 570.000 585.000 590.000 595.000 595.000 605.000 610.000 615.000 620.000 626.264 633.162 640.794 649.286 658.790 669.499 681.658 695.582
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 0 0 0 45 45 0 0 48 54 51 51 0 0 0 0 0 48 54 54 48 0 48 48 51 54 54 57 57 48 0 51 54 0 51 57 54 57 57 57 60 57 48 60 60 60 48 51 54 60 60 60 60 60 57 57 57 57 57 57 51 54 51 57 54 54 51 57 57 0 51 54 51 48 48 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 0.390625 2.734375 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 -1.953125 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 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" >
89.493 90.0 95.0 100.0 105.0 110.0 111.813 113.626 115.0 115.439 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 389.596 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.238 2.878 3.218 3.326 3.203 3.203 3.296 3.326 3.44 3.556 3.668 3.779 3.89 4.002 4.116 4.232 4.35 4.471 4.595 4.721 4.849 4.978 5.108 5.238 5.368 5.497 5.624 5.749 5.873 5.994 6.113 6.229 6.343 6.455 6.565 6.672 6.778 6.882 6.984 7.085 7.184 7.282 7.379 7.474 7.569 7.663 7.756 7.848 7.94 8.031 8.122 8.213 8.302 8.392 8.481 8.568 8.654 8.738 8.817 8.889 8.948 8.987 9.0 9.0 8.998 8.991 8.981 8.966 8.949 8.927 8.902 8.874 8.843 8.809 8.772 8.732 8.69 8.645 8.597 8.548 8.496 8.442 8.387 8.329 8.27 8.209 8.147 8.083 8.018 7.952 7.885 7.817 7.747 7.677 7.606 7.535 7.463 7.39 7.317 7.243 7.169 7.094 7.02 6.945 6.87 6.795 6.72 6.645 6.57 6.495 6.42 6.345 6.27 6.196 6.122 6.048 5.975 5.902 5.829 5.757 5.685 5.614 5.543 5.472 5.402 5.333 5.264 5.195 5.127 5.06 4.993 4.927 4.862 4.797 4.732 4.669 4.605 4.543 4.481 4.42 4.359 4.299 4.24 4.181 4.123 4.066 4.009 3.953 3.898 3.843 3.789 3.735 3.682 3.63 3.579 3.528 3.477 3.428 3.378 3.33 3.282 3.235 3.188 3.142 3.097 3.052 3.008 2.964 2.921 2.878 2.836 2.795 2.754 2.714 2.674 2.635 2.596 2.558 2.52 2.483 2.447 2.411 2.375 2.34 2.305 2.271

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.326" PeakHeight="110.0" Num="3" Error="0.0">
-30.455 13.083 -3.135
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.326" EndFrequency="9.0" PeakHeight="389.596" Num="5" zHalfNm="240.925" Error="5.489">
-234.246 -62.141 32.437 -14.43 4.223
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.439" Depth="0.123"/>
<TopsideChapman PeakHeight="389.596" PeakDensity="1004962.75" PeakScaleHeight="102.286" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
