<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-11 -042 23:40:00.000"
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 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, 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" >
2026.02.11 (042) 23:40:00</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">
FF202604202112340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.594" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.993" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="355.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="355.000" 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="8.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="491.136" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="421.182" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="361.629" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.064" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="87.640" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="20.486" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="45.131" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="90.560" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.720" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="103">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
465.000 465.000 465.000 462.500 460.000 430.000 430.000 430.000 415.000 410.000 405.000 405.000 405.000 398.333 391.667 385.000 378.333 371.667 365.000 360.000 355.000 356.000 357.000 358.000 359.000 360.000 362.000 364.000 366.000 368.000 370.000 372.500 375.000 375.000 375.000 380.000 355.000 360.000 365.000 367.500 370.000 375.000 380.000 390.000 392.500 395.000 395.000 395.000 400.000 400.000 402.500 405.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 420.000 421.250 422.500 423.750 425.000 425.000 425.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 445.000 450.000 450.000 450.000 450.000 452.500 455.000 457.500 460.000 465.000 465.000 475.000 477.500 480.000 482.500 485.000 485.000 487.871 491.136 494.881 499.223 504.314 510.368 517.685 526.710 538.116 552.990 573.197
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 54 0 51 69 63 66 66 54 60 63 54 0 0 0 0 0 57 51 57 0 0 48 0 51 66 57 57 0 57 57 60 57 57 57 60 63 63 0 69 75 63 57 0 60 63 60 66 63 66 69 69 72 72 69 72 69 72 72 75 75 0 0 0 72 75 69 72 75 75 75 69 69 69 69 66 66 0 66 0 72 0 69 60 63 60 0 0 0 51 63 60 63 0 63 0 0 48 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.953125 -1.171875 -1.171875 2.734375 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -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 1.171875 -1.171875 -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 1.171875 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 1.171875 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -1.171875 2.734375 2.734375 2.734375 2.734375 -0.390625
</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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.901 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.801 180.0 185.0 190.0 195.0 200.0 205.0 210.0 214.702 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 421.182 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.331 0.312 0.286 0.249 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.201 0.223 0.245 0.267 0.289 0.311 0.333 0.354 0.357 0.411 0.48 0.565 0.666 0.78 0.903 1.035 1.173 1.319 1.472 1.633 1.802 1.98 2.167 2.364 2.572 2.792 3.024 3.268 3.526 3.798 4.083 4.383 4.697 5.023 5.361 5.71 6.065 6.424 6.782 7.135 7.478 7.804 8.108 8.386 8.631 8.839 9.008 9.134 9.214 9.249 9.25 9.244 9.217 9.171 9.107 9.027 8.932 8.824 8.704 8.573 8.434 8.287 8.133 7.973 7.809 7.642 7.471 7.298 7.124 6.949 6.774 6.6 6.426 6.253 6.083 5.914 5.747 5.583 5.421 5.262 5.106 4.954 4.804 4.658 4.515 4.376 4.239 4.107 3.977 3.851 3.729 3.61 3.494 3.381 3.272 3.165 3.062 2.962 2.865 2.771 2.68 2.592 2.506 2.423 2.342 2.264 2.189 2.116 2.045 1.977 1.911 1.847 1.785 1.725 1.667 1.611 1.557 1.504 1.453 1.404 1.357 1.311 1.267 1.224 1.183 1.143 1.104 1.067 1.03 0.996 0.962 0.929 0.898 0.867 0.838 0.809 0.782 0.755 0.73 0.705 0.681 0.658 0.636 0.614 0.593 0.573 0.553 0.535 0.517 0.499 0.482 0.466 0.45 0.434 0.42 0.405 0.392 0.378 0.365 0.353 0.341 0.329 0.318 0.307 0.297 0.287 0.277

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="9.25" PeakHeight="421.182" Num="5" zHalfNm="361.629" Error="6.205">
-197.756 -14.392 6.736 0.869 -1.937
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="104.702" Depth="0.154"/>
<TopsideChapman PeakHeight="421.182" PeakDensity="1061569.5" PeakScaleHeight="45.131" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
