<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-13 -044 21:40:00.000"
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: One of F2 cusps was derived from the other, 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) 21:40:00</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">
FF202604402132140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.680" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.448" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="8.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="490.855" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.642" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="386.858" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="333.064" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.032" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="79.523" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="16.457" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="39.174" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="89.100" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.350" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="129">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 316.000 317.000 318.000 319.000 320.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 321.364 322.727 324.091 325.455 326.818 328.182 329.545 330.909 332.273 333.636 335.000 335.000 335.000 335.000 335.000 336.250 337.500 338.750 340.000 340.000 340.000 345.000 350.000 345.000 347.000 349.000 351.000 353.000 355.000 355.000 355.000 355.000 355.000 355.000 357.500 360.000 362.500 365.000 366.000 367.000 368.000 369.000 370.000 375.000 372.500 370.000 375.000 376.000 377.000 378.000 379.000 380.000 380.000 380.000 385.000 390.000 390.000 391.667 393.333 395.000 396.667 398.333 400.000 400.000 401.500 403.000 404.500 406.000 407.500 409.000 410.500 412.000 413.500 415.000 415.000 420.000 422.500 425.000 425.000 430.000 430.000 435.000 436.429 437.857 439.286 440.714 442.143 443.571 445.000 447.500 450.000 450.000 455.000 457.500 460.000 460.000 465.000 465.000 465.000 465.000 470.000 475.000 476.128 477.404 478.859 480.534 482.482 484.777 487.519 490.855 495.000 500.289 507.271
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 0 0 0 66 66 0 0 0 54 63 63 63 66 0 0 0 0 0 0 0 0 0 0 63 63 66 66 63 0 0 0 60 60 66 51 54 0 0 0 0 0 57 0 0 66 0 60 0 66 0 60 0 0 0 0 66 51 0 66 66 0 69 0 0 66 0 0 66 60 63 0 0 0 0 0 60 63 0 57 0 0 0 0 0 0 0 66 63 63 0 60 60 54 60 51 0 0 0 60 0 0 63 57 63 63 60 48 60 66 57 66 63 63 54 63 66 66 60 60 0 0 0 0 57 48 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.953125 -1.953125 1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="171">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.947 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.906 140.0 145.0 150.0 155.0 160.0 161.812 165.0 170.0 175.0 180.0 185.0 187.718 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 386.858 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.426 0.556 0.622 0.642 0.633 0.604 0.554 0.475 0.345 0.311 0.311 0.311 0.311 0.311 0.311 0.311 0.352 0.416 0.48 0.543 0.607 0.642 0.708 0.814 0.91 1.005 1.104 1.208 1.319 1.439 1.569 1.711 1.864 2.03 2.208 2.399 2.6 2.811 3.031 3.258 3.491 3.729 3.972 4.217 4.467 4.719 4.973 5.231 5.492 5.755 6.022 6.292 6.565 6.842 7.12 7.401 7.681 7.957 8.22 8.457 8.643 8.742 8.75 8.745 8.715 8.661 8.585 8.489 8.376 8.248 8.107 7.954 7.792 7.621 7.445 7.263 7.077 6.889 6.699 6.508 6.318 6.128 5.94 5.754 5.57 5.388 5.211 5.036 4.865 4.698 4.535 4.376 4.222 4.071 3.925 3.783 3.646 3.512 3.383 3.258 3.137 3.02 2.907 2.798 2.693 2.591 2.493 2.398 2.307 2.219 2.134 2.053 1.974 1.898 1.825 1.755 1.687 1.622 1.559 1.499 1.441 1.385 1.332 1.28 1.23 1.183 1.137 1.092 1.05 1.009 0.97 0.932 0.896 0.861 0.827 0.795 0.764 0.734 0.706 0.678 0.652 0.626 0.602 0.578 0.556 0.534 0.513 0.493 0.474 0.455 0.438 0.42 0.404 0.388 0.373 0.358 0.344 0.331 0.318 0.306 0.294 0.282 0.271 0.261 0.25 0.241 0.231 0.222 0.213 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.642" PeakHeight="110.0" Num="3" Error="0.0">
-24.119 5.723 -0.657
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.642" EndFrequency="8.75" PeakHeight="386.858" Num="5" zHalfNm="333.064" Error="4.224">
-171.861 -42.862 19.617 -8.008 3.974
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.718" Depth="0.331"/>
<TopsideChapman PeakHeight="386.858" PeakDensity="949906.94" PeakScaleHeight="39.174" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
