<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-01 -032 19:40:00.000"
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 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" >
2026.02.01 (032) 19:40:00</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">
FF202603202011940009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.340" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.442" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="10.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="560.000" 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="2.485" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="418.371" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="308.889" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.534" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="147.872" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.830" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="78.418" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="182.210" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.280" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="158">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 247.000 249.000 251.000 253.000 255.000 255.000 260.000 260.000 260.000 265.000 270.000 273.000 276.000 279.000 282.000 285.000 285.000 285.000 287.500 290.000 295.000 300.000 301.667 303.333 305.000 307.500 310.000 312.500 315.000 315.000 320.000 322.500 325.000 325.000 327.500 330.000 333.333 336.667 340.000 343.333 346.667 350.000 350.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 361.667 363.333 365.000 370.000 370.000 370.000 372.500 375.000 380.000 380.000 382.500 385.000 390.000 390.000 390.000 395.000 395.000 395.000 397.500 400.000 400.000 400.000 402.500 405.000 410.000 412.500 415.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 435.000 440.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 455.000 460.000 465.000 465.000 470.000 470.000 470.000 475.000 475.000 480.000 480.000 485.000 490.000 490.000 490.000 490.000 495.000 495.000 495.000 500.000 500.000 500.000 505.000 505.000 505.000 510.000 510.000 512.500 515.000 515.000 520.000 520.000 525.000 525.000 530.000 532.500 535.000 537.500 540.000 542.500 545.000 550.000 550.000 555.000 560.000 560.000 565.000 570.000 575.000 580.000 585.000 590.000 595.000 600.000 606.848 614.408 622.799 632.165 642.686 654.591 668.170
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 0 0 51 0 48 54 48 51 48 51 48 0 51 0 0 54 57 54 0 54 60 57 0 0 60 0 57 0 57 0 57 0 60 0 0 60 0 0 0 54 0 54 60 51 0 63 63 60 63 63 57 0 0 54 63 57 63 0 57 63 60 0 63 63 0 66 63 69 63 0 66 63 66 0 63 69 0 66 63 66 63 66 66 66 66 63 51 60 66 60 66 57 63 57 63 63 63 54 63 57 63 63 63 63 63 63 63 51 60 63 69 60 66 66 60 0 66 60 0 63 63 63 0 63 63 63 63 60 63 57 0 0 0 48 42 51 48 48 51 48 45 48 48 48 0 45 48 48 48 48 48 0 45 0 0 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 1.171875 -0.390625 -0.390625 1.171875 -2.734375 -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 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 1.171875 -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 1.953125 -0.390625 1.953125
</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" >
89.643 90.0 95.0 100.0 105.0 110.0 115.0 115.659 120.0 121.318 125.0 126.977 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 418.371 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.23 1.668 2.152 2.405 2.485 2.388 2.36 2.36 2.36 2.441 2.485 2.545 2.648 2.754 2.865 2.979 3.098 3.221 3.348 3.481 3.617 3.758 3.903 4.052 4.205 4.36 4.518 4.679 4.841 5.006 5.171 5.337 5.504 5.672 5.84 6.008 6.177 6.345 6.513 6.682 6.85 7.018 7.186 7.354 7.523 7.691 7.859 8.028 8.197 8.366 8.535 8.705 8.875 9.046 9.217 9.389 9.561 9.733 9.905 10.077 10.247 10.416 10.581 10.741 10.892 11.03 11.148 11.238 11.29 11.3 11.3 11.292 11.276 11.253 11.221 11.182 11.136 11.083 11.024 10.959 10.889 10.813 10.732 10.647 10.558 10.464 10.367 10.267 10.163 10.057 9.948 9.837 9.724 9.609 9.492 9.374 9.255 9.134 9.013 8.891 8.769 8.646 8.523 8.4 8.277 8.155 8.032 7.91 7.788 7.667 7.546 7.426 7.307 7.189 7.072 6.956 6.84 6.726 6.613 6.501 6.39 6.281 6.172 6.065 5.959 5.855 5.752 5.65 5.55 5.45 5.353 5.256 5.162 5.068 4.976 4.885 4.795 4.707 4.621 4.535 4.451 4.369 4.287 4.207 4.129 4.051 3.975 3.901 3.827 3.755 3.684 3.614 3.545 3.478 3.412 3.347 3.283 3.22 3.158 3.098 3.039 2.98 2.923 2.867 2.811 2.757 2.704 2.652 2.6 2.55 2.501 2.452 2.405 2.358 2.312 2.267 2.223 2.18 2.138 2.096 2.055 2.015 1.976 1.937 1.899 1.862 1.826

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.485" PeakHeight="110.0" Num="3" Error="0.0">
-29.699 11.988 -2.646
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.485" EndFrequency="11.3" PeakHeight="418.371" Num="5" zHalfNm="308.889" Error="3.912">
-242.751 -67.281 27.117 -10.33 1.851
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="16.977" Depth="0.125"/>
<TopsideChapman PeakHeight="418.371" PeakDensity="1584243.1" PeakScaleHeight="78.418" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
