<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-11 -042 17:40:00.000"
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: 70% PACIFIC flags: F2x cusp not found, 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" >
2026.02.11 (042) 17:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" 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">
FF202604202111740009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.239" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.052" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="210.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="210.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="595.000" 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="3.147" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.246" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="410.303" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="260.464" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.366" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="189.200" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="53.845" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="103.323" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="243.930" 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="111">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
210.000 215.000 225.000 233.333 241.667 250.000 255.000 265.000 265.000 270.000 270.000 275.000 280.000 285.000 285.000 288.333 291.667 295.000 298.750 302.500 306.250 310.000 314.167 318.333 322.500 326.667 330.833 335.000 335.000 340.000 345.000 350.000 350.000 353.750 357.500 361.250 365.000 365.000 367.500 370.000 375.000 380.000 385.000 390.000 390.000 392.500 395.000 400.000 400.000 405.000 410.000 410.000 415.000 415.000 420.000 425.000 430.000 430.000 435.000 440.000 440.000 445.000 450.000 455.000 460.000 460.000 465.000 470.000 475.000 480.000 485.000 490.000 500.000 500.000 505.000 510.000 515.000 525.000 530.000 535.000 535.000 540.000 550.000 550.000 555.000 555.000 560.000 565.000 570.000 575.000 580.000 580.000 585.000 590.000 595.000 595.000 595.000 605.000 610.000 615.000 620.000 626.278 633.179 640.802 649.265 658.715 669.336 681.360 695.084 710.897 729.315
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 54 0 0 54 54 51 60 57 54 57 0 51 48 0 0 48 0 0 0 54 0 0 54 0 0 60 51 57 57 54 54 0 0 0 60 60 0 0 57 60 54 45 54 0 57 51 57 57 54 60 60 57 57 57 54 57 57 57 57 57 60 57 60 60 57 57 57 54 60 57 51 57 57 57 57 57 57 60 60 60 57 57 60 60 57 60 60 60 57 63 63 60 54 60 63 57 57 60 57 57 57 57 57 57 57 54 54 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 -1.171875 -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 -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 -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" >
89.522 90.0 95.0 100.0 105.0 110.0 112.573 115.0 115.146 117.719 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 410.303 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.116 2.724 3.045 3.147 3.025 3.025 3.025 3.147 3.194 3.301 3.416 3.539 3.67 3.809 3.954 4.105 4.259 4.415 4.571 4.727 4.881 5.032 5.18 5.324 5.466 5.604 5.739 5.871 6.0 6.126 6.251 6.372 6.492 6.61 6.727 6.841 6.955 7.067 7.177 7.287 7.396 7.504 7.611 7.718 7.824 7.93 8.035 8.14 8.245 8.349 8.453 8.557 8.661 8.765 8.869 8.973 9.076 9.178 9.28 9.38 9.477 9.569 9.656 9.732 9.793 9.834 9.85 9.85 9.848 9.842 9.831 9.816 9.798 9.775 9.749 9.72 9.687 9.65 9.611 9.568 9.523 9.475 9.425 9.372 9.316 9.259 9.199 9.137 9.074 9.009 8.942 8.873 8.804 8.732 8.66 8.586 8.512 8.436 8.36 8.283 8.205 8.126 8.047 7.967 7.887 7.807 7.726 7.645 7.564 7.483 7.401 7.32 7.239 7.157 7.076 6.995 6.914 6.834 6.753 6.673 6.593 6.514 6.435 6.356 6.278 6.2 6.123 6.046 5.97 5.894 5.819 5.745 5.671 5.597 5.524 5.452 5.381 5.31 5.239 5.17 5.101 5.032 4.965 4.898 4.832 4.766 4.701 4.637 4.573 4.51 4.448 4.387 4.326 4.266 4.207 4.148 4.09 4.033 3.976 3.92 3.865 3.81 3.756 3.703 3.65 3.599 3.547 3.497 3.447 3.397 3.349 3.301 3.253 3.206 3.16 3.114 3.069 3.025 2.981 2.938 2.895 2.853 2.812 2.771 2.731 2.691

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.147" PeakHeight="110.0" Num="3" Error="0.0">
-30.315 12.879 -3.042
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.147" EndFrequency="9.85" PeakHeight="410.303" Num="5" zHalfNm="260.464" Error="4.746">
-256.108 -61.165 37.683 -14.577 1.583
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.719" Depth="0.122"/>
<TopsideChapman PeakHeight="410.303" PeakDensity="1203753.1" PeakScaleHeight="103.323" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
