<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-12 -043 17:00:00.000"
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: 70% PACIFIC flags: One of F2 cusps was derived from the other, Trace overlaps while constructing baseline</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" >
2026.02.12 (043) 17:00:00</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">
FF202604302121700009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.340" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.933" 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="10.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="195.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="195.000" 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="9.150" 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="3.262" 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="4.301" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="381.555" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="246.454" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.111" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="168.629" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.296" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="93.386" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="223.960" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.240" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="110">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
195.000 195.000 200.000 200.000 207.500 215.000 220.000 225.000 235.000 245.000 260.000 265.000 275.000 275.000 282.500 290.000 290.000 295.000 297.500 300.000 302.500 305.000 310.000 310.000 310.000 312.500 315.000 320.000 320.000 325.000 330.000 335.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 355.000 360.000 360.000 365.000 365.000 370.000 375.000 375.000 380.000 385.000 390.000 390.000 390.000 390.000 400.000 405.000 405.000 410.000 415.000 420.000 420.000 425.000 425.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 455.000 460.000 465.000 470.000 475.000 475.000 480.000 485.000 490.000 495.000 500.000 505.000 505.000 510.000 515.000 520.000 525.000 525.000 530.000 535.000 540.000 545.000 550.000 550.000 555.000 560.000 560.000 565.000 570.000 575.000 579.646 584.836 590.673 597.284 604.836 613.544 623.696 635.684 650.054 667.595
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 51 45 54 0 51 54 54 54 57 54 57 54 54 0 51 54 54 0 54 0 57 0 60 57 0 0 0 0 0 51 0 48 45 57 54 60 63 57 57 54 60 54 54 51 63 54 57 54 0 54 63 63 60 54 51 63 60 54 60 63 66 72 69 60 69 69 69 69 60 60 60 57 54 51 57 60 57 54 57 57 51 54 51 51 51 54 54 54 54 54 54 48 57 57 51 54 54 51 51 48 51 45 48 48 48 48 48 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 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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
</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" >
89.502 90.0 95.0 100.0 105.0 110.0 112.081 114.162 115.0 116.243 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 381.555 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.194 2.823 3.156 3.262 3.14 3.14 3.189 3.262 3.353 3.481 3.617 3.761 3.911 4.066 4.225 4.385 4.544 4.703 4.86 5.014 5.165 5.313 5.458 5.6 5.739 5.876 6.01 6.142 6.271 6.399 6.525 6.65 6.773 6.894 7.015 7.135 7.253 7.371 7.488 7.605 7.721 7.837 7.953 8.068 8.184 8.299 8.414 8.53 8.645 8.761 8.876 8.991 9.106 9.219 9.331 9.439 9.542 9.635 9.714 9.771 9.798 9.8 9.799 9.792 9.781 9.764 9.743 9.717 9.687 9.652 9.613 9.571 9.525 9.475 9.422 9.366 9.307 9.245 9.181 9.114 9.045 8.973 8.9 8.824 8.747 8.669 8.589 8.507 8.424 8.341 8.256 8.17 8.084 7.997 7.909 7.821 7.732 7.643 7.554 7.464 7.375 7.285 7.196 7.106 7.017 6.928 6.839 6.75 6.662 6.574 6.486 6.399 6.313 6.227 6.141 6.057 5.972 5.889 5.806 5.724 5.642 5.561 5.481 5.402 5.323 5.246 5.169 5.093 5.017 4.943 4.869 4.796 4.724 4.653 4.583 4.513 4.444 4.377 4.31 4.243 4.178 4.114 4.05 3.987 3.925 3.864 3.804 3.744 3.686 3.628 3.571 3.514 3.459 3.404 3.35 3.297 3.245 3.193 3.142 3.092 3.043 2.994 2.946 2.899 2.852 2.806 2.761 2.717 2.673 2.63 2.587 2.546 2.504 2.464 2.424 2.385 2.346 2.308 2.27 2.233 2.197 2.161 2.126 2.091 2.057 2.024

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.262" PeakHeight="110.0" Num="3" Error="0.0">
-30.406 13.011 -3.103
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.262" EndFrequency="9.8" PeakHeight="381.555" Num="5" zHalfNm="246.454" Error="5.907">
-228.809 -59.751 33.228 -10.914 0.934
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.243" Depth="0.122"/>
<TopsideChapman PeakHeight="381.555" PeakDensity="1191563.2" PeakScaleHeight="93.386" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
