<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-13 -044 22:40:00.000"
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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Unidentified traces above foF2</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" >
2026.02.13 (044) 22:40:00</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">
FF202604402132240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.588" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.800" 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="8.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="420.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="420.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="507.078" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="427.397" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="365.266" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.616" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="92.356" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="14.579" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="46.279" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="98.530" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.600" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="67">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
450.000 445.000 440.000 430.000 425.000 420.000 425.000 440.000 445.000 440.000 435.000 430.000 430.000 430.000 430.000 430.000 428.571 427.143 425.714 424.286 422.857 421.429 420.000 420.000 425.000 425.000 425.000 426.667 428.333 430.000 430.000 435.000 435.000 440.000 440.000 440.000 445.000 440.000 445.000 445.000 447.500 450.000 455.000 457.500 460.000 462.500 465.000 470.000 472.500 475.000 475.000 476.225 477.601 479.158 480.933 482.976 485.353 488.153 491.499 495.569 500.625 507.078 515.596 527.361 544.668 572.635 625.500
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 51 57 60 63 63 57 54 0 0 0 54 0 60 63 63 57 57 63 0 63 63 66 0 0 63 0 69 69 69 69 69 69 66 72 60 69 69 72 60 63 60 54 60 0 63 54 0 54 54 57 57 66 66 69 66 63 0 0 57 0 51 51 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.953125 2.734375 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 1.953125
</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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.441 145.0 150.0 155.0 160.0 165.0 170.0 174.882 175.0 180.0 185.0 190.0 195.0 200.0 205.0 207.323 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 427.397 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.327 0.305 0.273 0.229 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.201 0.224 0.248 0.272 0.296 0.319 0.343 0.354 0.38 0.435 0.497 0.568 0.648 0.738 0.837 0.946 1.063 1.189 1.323 1.464 1.612 1.766 1.926 2.092 2.263 2.439 2.621 2.807 2.998 3.194 3.395 3.6 3.81 4.025 4.244 4.467 4.694 4.925 5.16 5.397 5.636 5.875 6.115 6.351 6.582 6.805 7.014 7.205 7.37 7.503 7.596 7.644 7.65 7.648 7.631 7.598 7.551 7.49 7.418 7.335 7.242 7.14 7.031 6.916 6.794 6.668 6.537 6.404 6.267 6.129 5.989 5.849 5.708 5.567 5.426 5.286 5.147 5.01 4.874 4.739 4.607 4.477 4.349 4.223 4.1 3.979 3.861 3.746 3.633 3.523 3.415 3.31 3.208 3.109 3.012 2.918 2.826 2.737 2.65 2.566 2.485 2.405 2.328 2.254 2.181 2.111 2.043 1.977 1.913 1.85 1.79 1.732 1.676 1.621 1.568 1.517 1.467 1.419 1.372 1.327 1.284 1.242 1.201 1.161 1.123 1.086 1.05 1.016 0.982 0.95 0.918 0.888 0.859 0.83 0.803 0.776 0.751 0.726 0.702 0.678 0.656 0.634 0.613 0.593 0.573 0.554 0.536 0.518 0.501 0.484 0.468 0.453 0.438 0.423 0.409 0.396 0.383 0.37 0.358 0.346 0.334 0.323 0.312 0.302 0.292 0.282 0.273 0.264

</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="7.65" PeakHeight="427.397" Num="5" zHalfNm="365.266" Error="3.202">
-204.976 -26.485 17.012 -6.582 0.957
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="97.323" Depth="0.154"/>
<TopsideChapman PeakHeight="427.397" PeakDensity="726085.6" PeakScaleHeight="46.279" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
