<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-01 -032 20:40:00.000"
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) 20:40:00</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">
FF202603202012040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.252" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.532" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" 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="9.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="575.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.805" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="436.329" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="309.232" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.322" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="175.665" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.327" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="89.299" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="197.270" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.570" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="152">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 270.000 270.000 270.000 270.000 272.500 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 281.667 283.333 285.000 290.000 290.000 291.111 292.222 293.333 294.444 295.556 296.667 297.778 298.889 300.000 300.000 305.000 305.000 305.000 305.000 306.667 308.333 310.000 315.000 315.000 317.500 320.000 322.500 325.000 320.000 325.000 330.000 330.000 330.000 331.667 333.333 335.000 336.667 338.333 340.000 341.667 343.333 345.000 350.000 350.000 355.000 355.000 355.000 358.333 361.667 365.000 365.000 365.000 368.333 371.667 375.000 375.000 380.000 385.000 385.000 390.000 390.000 392.500 395.000 400.000 405.000 405.000 405.000 410.000 415.000 415.000 415.000 418.750 422.500 426.250 430.000 435.000 435.000 440.000 440.000 445.000 450.000 455.000 460.000 460.000 465.000 470.000 475.000 475.000 485.000 490.000 490.000 495.000 500.000 505.000 505.000 510.000 510.000 515.000 515.000 520.000 520.000 525.000 525.000 530.000 530.000 530.000 540.000 540.000 545.000 550.000 555.000 555.000 555.000 565.000 565.000 570.000 575.000 575.000 581.250 587.500 593.750 600.000 606.250 612.500 618.750 625.000 630.000 640.000 645.000 653.750 662.500 671.250 680.000 692.121 705.383 719.955
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 54 63 57 57 0 60 66 63 60 57 63 60 0 63 60 0 0 63 57 57 0 54 0 0 63 0 0 0 63 60 63 0 63 57 0 0 0 60 66 0 0 0 0 57 0 54 0 63 0 0 66 0 0 0 0 0 66 60 63 60 63 66 0 0 63 63 60 0 0 63 63 0 60 63 60 66 0 66 60 54 63 66 66 63 66 63 0 66 0 63 69 66 66 66 63 66 66 66 66 63 66 66 63 63 60 66 66 60 54 63 60 66 60 66 66 66 63 69 63 66 69 60 66 66 66 63 63 66 63 66 66 66 63 0 0 0 0 57 0 0 54 54 48 48 51 0 45 45 45 48 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 -1.171875 -0.390625 -0.390625 -2.734375 -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 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -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 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 1.953125 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -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 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -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 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" >
89.821 90.0 95.0 100.0 105.0 110.0 115.0 119.324 120.0 125.0 128.649 130.0 135.0 137.973 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 436.329 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.215 1.208 1.563 1.747 1.805 1.766 1.668 1.668 1.668 1.668 1.688 1.761 1.805 1.847 1.947 2.047 2.148 2.252 2.361 2.476 2.599 2.731 2.874 3.028 3.195 3.375 3.568 3.77 3.981 4.195 4.41 4.623 4.832 5.037 5.235 5.428 5.616 5.798 5.975 6.148 6.317 6.482 6.644 6.802 6.958 7.112 7.263 7.412 7.559 7.705 7.85 7.993 8.134 8.275 8.415 8.554 8.692 8.83 8.966 9.102 9.237 9.37 9.502 9.632 9.76 9.884 10.003 10.115 10.217 10.306 10.378 10.427 10.449 10.45 10.448 10.441 10.427 10.407 10.382 10.352 10.317 10.276 10.231 10.182 10.129 10.071 10.01 9.945 9.877 9.806 9.732 9.655 9.576 9.494 9.41 9.324 9.236 9.147 9.056 8.963 8.87 8.775 8.679 8.582 8.485 8.387 8.288 8.189 8.089 7.99 7.89 7.79 7.69 7.59 7.491 7.391 7.292 7.193 7.095 6.997 6.899 6.803 6.706 6.611 6.515 6.421 6.328 6.235 6.143 6.051 5.961 5.871 5.783 5.695 5.608 5.522 5.437 5.353 5.27 5.188 5.107 5.026 4.947 4.869 4.792 4.715 4.64 4.566 4.492 4.42 4.349 4.278 4.209 4.14 4.073 4.006 3.941 3.876 3.812 3.749 3.687 3.627 3.566 3.507 3.449 3.392 3.335 3.279 3.225 3.171 3.118 3.065 3.014 2.963 2.913 2.864 2.816 2.768 2.722 2.676 2.63 2.586 2.542 2.499 2.456 2.415 2.374

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.805" PeakHeight="110.0" Num="3" Error="0.0">
-28.743 10.686 -2.122
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.805" EndFrequency="10.45" PeakHeight="436.329" Num="5" zHalfNm="309.232" Error="7.912">
-275.851 -39.295 31.741 -21.476 6.525
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="27.973" Depth="0.137"/>
<TopsideChapman PeakHeight="436.329" PeakDensity="1354869.8" PeakScaleHeight="89.299" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
