<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-11 -042 13:00:00.000"
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 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" >
2026.02.11 (042) 13:00:00</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">
FF202604202111300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.697" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.588" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="285.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="285.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" 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="3.202" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.272" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="332.280" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="250.684" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.082" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="103.830" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.128" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="59.551" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="150.180" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.030" 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" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 290.000 295.000 298.333 301.667 305.000 308.333 311.667 315.000 315.000 317.500 320.000 322.500 325.000 327.500 330.000 330.000 330.000 330.000 331.000 332.000 333.000 334.000 335.000 335.000 340.000 340.000 340.000 341.250 342.500 343.750 345.000 345.000 345.000 346.667 348.333 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 357.500 360.000 360.000 360.000 365.000 360.000 362.500 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 381.000 382.000 383.000 384.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 402.500 405.000 410.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 435.000 440.000 445.000 445.000 445.000 450.000 450.000 450.000 460.000 460.000 465.000 465.000 470.000 475.000 480.000 480.000 485.000 490.000 496.466 504.194 513.594
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 45 0 0 0 0 0 51 54 0 0 0 54 0 54 54 57 54 0 54 0 0 51 45 54 51 51 0 0 0 48 48 51 0 0 54 57 60 57 57 60 0 63 60 0 60 63 66 60 57 0 63 57 0 63 63 54 57 57 48 0 0 0 0 48 57 51 57 54 51 51 54 57 0 54 48 54 54 48 54 57 57 54 54 51 54 57 51 54 54 51 45 51 57 51 57 54 45 51 45 48 51 48 42 48 48 48 48 48 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -2.734375 0.390625 1.171875 -2.734375 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625
</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" >
89.513 90.0 95.0 100.0 105.0 110.0 112.335 114.669 115.0 117.004 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 332.28 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.153 2.771 3.098 3.202 3.08 3.08 3.097 3.202 3.326 3.501 3.659 3.807 3.95 4.09 4.229 4.369 4.508 4.649 4.792 4.936 5.083 5.232 5.384 5.54 5.698 5.859 6.024 6.193 6.364 6.54 6.719 6.901 7.087 7.276 7.469 7.665 7.864 8.067 8.273 8.482 8.694 8.909 9.126 9.344 9.563 9.781 9.993 10.194 10.374 10.514 10.591 10.6 10.598 10.583 10.555 10.514 10.462 10.398 10.324 10.241 10.149 10.049 9.941 9.827 9.707 9.582 9.451 9.317 9.179 9.038 8.894 8.747 8.599 8.45 8.299 8.148 7.996 7.844 7.692 7.541 7.39 7.24 7.091 6.943 6.796 6.651 6.507 6.365 6.225 6.086 5.95 5.816 5.683 5.553 5.425 5.299 5.175 5.053 4.934 4.817 4.702 4.59 4.479 4.371 4.265 4.161 4.06 3.961 3.863 3.768 3.675 3.584 3.495 3.409 3.324 3.241 3.16 3.08 3.003 2.928 2.854 2.782 2.712 2.643 2.576 2.511 2.447 2.385 2.324 2.265 2.208 2.151 2.096 2.043 1.991 1.94 1.89 1.842 1.795 1.749 1.704 1.66 1.617 1.576 1.535 1.496 1.457 1.42 1.383 1.348 1.313 1.279 1.246 1.214 1.183 1.152 1.123 1.094 1.066 1.038 1.011 0.985 0.96 0.935 0.911 0.887 0.864 0.842 0.82 0.799 0.778 0.758 0.739 0.72 0.701 0.683 0.665 0.648 0.631 0.615 0.599 0.584 0.568 0.554 0.539 0.525

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.202" PeakHeight="110.0" Num="3" Error="0.0">
-30.359 12.943 -3.071
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.202" EndFrequency="10.6" PeakHeight="332.28" Num="5" zHalfNm="250.684" Error="4.563">
-167.403 -63.753 15.429 -0.925 1.376
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.004" Depth="0.122"/>
<TopsideChapman PeakHeight="332.28" PeakDensity="1394044.6" PeakScaleHeight="59.551" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
