<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-19 -050 22:00:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, 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" >
2026.02.19 (050) 22:00:00</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">
FF202605002192200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.552" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.369" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="540.475" 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="0.399" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="437.127" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="380.028" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.910" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="86.277" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="21.021" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="41.974" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="96.200" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.340" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="143">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 345.000 345.000 345.000 348.750 352.500 356.250 360.000 360.000 360.000 360.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 365.000 370.000 367.500 365.000 375.000 375.000 375.000 375.000 375.000 375.000 377.500 380.000 375.000 380.000 375.000 377.500 380.000 382.500 385.000 385.000 380.000 382.500 385.000 387.500 390.000 390.000 392.500 395.000 395.000 395.000 397.500 400.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 412.500 415.000 420.000 420.000 420.000 425.000 426.000 427.000 428.000 429.000 430.000 430.000 430.000 430.000 430.000 435.000 437.000 439.000 441.000 443.000 445.000 450.000 450.000 450.000 450.000 450.000 455.000 455.000 457.500 460.000 460.000 463.333 466.667 470.000 472.500 475.000 475.000 480.000 485.000 480.000 484.000 488.000 492.000 496.000 500.000 500.000 500.000 500.000 500.000 502.500 505.000 505.000 515.000 525.000 520.000 515.000 520.000 520.000 525.000 530.000 530.000 530.000 530.000 532.500 535.000 535.000 540.000 537.500 535.000 537.500 540.000 540.013 540.032 540.060 540.107 540.200 540.475 564.971
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 0 54 0 0 0 60 0 66 66 66 0 57 66 0 66 69 69 63 63 0 54 0 66 57 66 57 60 0 0 0 63 0 69 66 0 0 0 0 0 63 69 0 0 0 0 69 63 0 66 0 60 63 69 0 0 0 72 0 66 0 0 72 0 0 72 75 0 72 72 0 0 66 0 69 69 66 72 66 75 0 0 72 0 69 75 0 0 0 72 69 66 0 66 69 0 0 75 0 69 78 0 78 75 0 78 0 0 78 75 0 0 63 0 66 63 0 54 0 57 63 66 57 60 54 63 66 57 69 69 54 0 60 57 0 60 0 57 0 0 0 51
</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 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -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 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -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 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -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 -1.171875 -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 -2.734375 1.953125 2.734375 -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" >
92.684 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.326 140.0 145.0 150.0 155.0 160.0 165.0 168.652 170.0 175.0 180.0 185.0 190.0 195.0 197.978 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 437.127 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.264 0.346 0.386 0.399 0.395 0.381 0.358 0.322 0.269 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.209 0.243 0.277 0.311 0.345 0.379 0.399 0.461 0.548 0.622 0.694 0.768 0.846 0.928 1.016 1.111 1.213 1.323 1.442 1.57 1.707 1.854 2.01 2.175 2.348 2.53 2.719 2.915 3.117 3.325 3.539 3.758 3.982 4.21 4.444 4.681 4.924 5.171 5.422 5.678 5.939 6.205 6.476 6.751 7.032 7.317 7.606 7.898 8.191 8.482 8.765 9.032 9.266 9.445 9.54 9.55 9.546 9.518 9.468 9.396 9.305 9.197 9.073 8.936 8.787 8.628 8.46 8.285 8.104 7.919 7.73 7.538 7.345 7.151 6.956 6.763 6.57 6.38 6.191 6.005 5.821 5.641 5.464 5.29 5.121 4.955 4.793 4.634 4.48 4.33 4.184 4.043 3.905 3.771 3.641 3.515 3.393 3.275 3.16 3.049 2.942 2.838 2.738 2.641 2.547 2.456 2.369 2.284 2.202 2.123 2.047 1.973 1.902 1.834 1.768 1.704 1.642 1.583 1.526 1.47 1.417 1.366 1.316 1.268 1.222 1.178 1.135 1.094 1.054 1.016 0.979 0.943 0.909 0.876 0.844 0.813 0.783 0.755 0.727 0.701 0.675 0.651 0.627 0.604 0.582 0.561 0.54 0.521 0.502 0.483 0.466 0.449 0.432 0.416 0.401 0.387 0.372 0.359 0.346 0.333 0.321 0.309 0.298 0.287 0.277 0.266 0.257 0.247 0.238

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.399" PeakHeight="110.0" Num="3" Error="0.0">
-20.189 3.089 -0.216
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.399" EndFrequency="9.55" PeakHeight="437.127" Num="5" zHalfNm="380.028" Error="6.73">
-210.255 -51.137 26.526 -9.213 4.93
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.978" Depth="0.199"/>
<TopsideChapman PeakHeight="437.127" PeakDensity="1131544.6" PeakScaleHeight="41.974" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
