<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-10 -041 21:40:00.000"
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" >
2026.02.10 (041) 21:40:00</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">
FF202604102102140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.549" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.707" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="497.224" 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="0.647" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="407.168" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="326.999" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.032" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="116.030" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="27.186" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="59.767" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="114.700" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.070" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="138">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.556 306.111 306.667 307.222 307.778 308.333 308.889 309.444 310.000 311.250 312.500 313.750 315.000 315.000 316.667 318.333 320.000 320.000 320.000 320.000 320.000 320.000 321.250 322.500 323.750 325.000 330.000 330.000 330.000 335.000 340.000 340.000 340.000 340.000 341.667 343.333 345.000 345.000 345.000 345.000 347.500 350.000 350.000 350.000 351.000 352.000 353.000 354.000 355.000 355.000 357.500 360.000 360.000 360.000 361.429 362.857 364.286 365.714 367.143 368.571 370.000 370.000 375.000 377.500 380.000 380.000 381.250 382.500 383.750 385.000 390.000 390.000 391.250 392.500 393.750 395.000 395.000 397.500 400.000 405.000 405.000 405.000 407.500 410.000 410.000 415.000 417.000 419.000 421.000 423.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 442.500 445.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 465.000 465.000 470.000 475.000 475.000 480.000 480.000 485.000 490.000 493.409 497.224 501.523 506.405 511.997 518.466 526.034 535.010 545.825 559.110 575.819 597.472 626.646
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 63 0 69 69 0 0 69 0 0 66 0 0 0 78 0 78 0 0 0 75 75 0 0 60 0 66 0 0 63 0 0 0 0 63 63 0 63 48 0 0 60 0 0 48 54 0 57 0 54 60 63 0 66 0 0 63 63 0 63 66 66 0 0 57 0 0 0 57 0 66 0 60 63 0 0 0 63 54 63 0 0 0 60 63 0 54 54 0 60 0 60 60 54 0 0 0 0 63 63 57 66 57 63 57 60 0 60 63 60 66 60 66 63 66 63 66 60 54 60 51 63 60 54 0 63 60 54 51 0 0 0 0 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 -1.171875 -0.390625 -0.390625 2.734375 -0.390625 -1.171875 -0.390625 -0.390625 -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 -1.171875 -1.171875 1.953125 -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 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -0.390625 -2.734375 2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -0.390625 2.734375 -2.734375 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.929 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.826 140.0 145.0 150.0 155.0 160.0 161.652 165.0 170.0 175.0 180.0 185.0 187.478 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 407.168 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.429 0.561 0.626 0.647 0.638 0.609 0.558 0.478 0.346 0.315 0.315 0.315 0.315 0.315 0.315 0.315 0.358 0.422 0.487 0.551 0.615 0.647 0.697 0.792 0.888 0.988 1.095 1.21 1.336 1.475 1.626 1.792 1.974 2.172 2.386 2.615 2.857 3.111 3.375 3.646 3.924 4.205 4.489 4.775 5.061 5.347 5.631 5.913 6.192 6.467 6.738 7.002 7.26 7.509 7.75 7.979 8.197 8.4 8.587 8.756 8.906 9.034 9.139 9.218 9.272 9.297 9.3 9.298 9.285 9.26 9.224 9.178 9.123 9.058 8.985 8.905 8.817 8.723 8.624 8.519 8.409 8.296 8.178 8.058 7.934 7.809 7.681 7.552 7.421 7.289 7.157 7.024 6.891 6.759 6.626 6.494 6.363 6.233 6.103 5.975 5.848 5.722 5.598 5.475 5.354 5.234 5.116 5.0 4.886 4.774 4.664 4.555 4.449 4.344 4.241 4.141 4.042 3.945 3.85 3.757 3.666 3.577 3.49 3.405 3.321 3.24 3.16 3.082 3.006 2.931 2.858 2.787 2.717 2.649 2.583 2.518 2.455 2.393 2.333 2.274 2.217 2.161 2.106 2.053 2.001 1.95 1.9 1.852 1.805 1.759 1.714 1.671 1.628 1.586 1.546 1.506 1.468 1.43 1.394 1.358 1.323 1.289 1.256 1.224 1.193 1.162 1.132 1.103 1.075 1.047 1.02 0.994 0.969 0.944 0.92 0.896 0.873 0.85 0.828 0.807 0.786 0.766 0.746 0.727 0.708 0.69

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.647" PeakHeight="110.0" Num="3" Error="0.0">
-24.169 5.763 -0.665
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.647" EndFrequency="9.3" PeakHeight="407.168" Num="5" zHalfNm="326.999" Error="2.681">
-219.757 -1.288 2.379 -3.006 1.982
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.478" Depth="0.332"/>
<TopsideChapman PeakHeight="407.168" PeakDensity="1073076.9" PeakScaleHeight="59.767" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
