<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-19 -050 21:20:00.000"
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: F2 cusps do not match</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) 21:20:00</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">
FF202605002192120009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.523" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.525" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="11.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="540.714" 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="0.994" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="406.701" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="333.466" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.140" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="107.738" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="41.718" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="51.830" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="119.180" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.470" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="200">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.15 2.2 2.25 2.3 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 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 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 275.000 275.000 275.833 276.667 277.500 278.333 279.167 280.000 285.000 280.000 275.000 280.000 280.000 280.000 280.000 280.000 285.000 282.500 280.000 282.500 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 286.563 288.125 289.688 291.250 292.813 294.375 295.938 297.500 299.063 300.625 302.188 303.750 305.313 306.875 308.438 310.000 305.000 305.000 308.333 311.667 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 317.500 320.000 320.000 325.000 325.000 325.000 325.000 325.000 327.500 330.000 335.000 333.333 331.667 330.000 335.000 340.000 341.000 342.000 343.000 344.000 345.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 357.000 359.000 361.000 363.000 365.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 387.500 390.000 392.500 395.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 412.500 415.000 415.000 420.000 422.500 425.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 435.000 437.500 440.000 440.000 445.000 445.000 445.000 445.000 445.000 450.000 451.667 453.333 455.000 455.000 455.000 460.000 460.000 461.667 463.333 465.000 466.667 468.333 470.000 470.000 475.000 476.250 477.500 478.750 480.000 480.000 480.000 480.000 480.000 483.333 486.667 490.000 490.000 490.000 491.250 492.500 493.750 495.000 500.000 501.667 503.333 505.000 506.667 508.333 510.000 511.667 513.333 515.000 516.000 517.000 518.000 519.000 520.000 525.000 530.000 532.143 534.286 536.429 538.571 540.714 544.943 549.769 555.329 561.805
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 57 60 0 0 0 0 0 60 0 0 63 69 66 60 72 69 66 0 69 0 69 0 69 75 69 66 63 60 57 48 0 0 0 0 0 0 0 0 0 48 0 0 0 0 51 72 72 0 0 57 57 0 63 69 66 69 66 0 72 69 60 48 75 0 66 0 0 57 0 0 0 75 69 0 0 0 0 72 63 66 60 0 0 72 78 0 0 0 0 72 78 78 75 72 75 57 69 72 66 72 75 0 69 0 69 0 57 66 66 72 72 72 60 66 75 72 75 72 60 66 69 63 0 51 57 69 57 63 63 51 66 69 0 63 63 57 57 66 69 72 66 0 0 60 63 66 60 57 0 0 0 0 0 60 60 51 0 0 0 51 57 57 51 48 0 0 51 0 57 0 0 0 51 45 0 0 0 0 0 0 0 0 51 0 48 0 0 54 54 51 0 0 0 0 0 0 54 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
90.276 95.0 100.0 105.0 110.0 115.0 120.0 125.0 127.078 130.0 135.0 140.0 144.156 145.0 150.0 155.0 160.0 161.234 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 406.701 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.662 0.861 0.962 0.994 0.977 0.926 0.833 0.78 0.78 0.78 0.78 0.78 0.791 0.853 0.916 0.979 0.994 1.061 1.149 1.24 1.336 1.439 1.552 1.676 1.814 1.97 2.146 2.346 2.571 2.82 3.089 3.371 3.661 3.953 4.243 4.528 4.808 5.083 5.353 5.618 5.879 6.136 6.391 6.643 6.894 7.143 7.391 7.638 7.886 8.134 8.383 8.633 8.884 9.138 9.394 9.653 9.914 10.179 10.448 10.719 10.992 11.265 11.532 11.779 11.981 12.092 12.1 12.095 12.071 12.026 11.964 11.884 11.789 11.679 11.556 11.422 11.277 11.122 10.959 10.789 10.612 10.43 10.243 10.053 9.859 9.664 9.466 9.267 9.068 8.869 8.67 8.472 8.275 8.079 7.885 7.694 7.504 7.317 7.132 6.951 6.772 6.596 6.423 6.254 6.088 5.925 5.765 5.609 5.456 5.307 5.161 5.018 4.879 4.743 4.61 4.48 4.354 4.231 4.111 3.994 3.88 3.769 3.661 3.556 3.454 3.354 3.258 3.163 3.072 2.983 2.896 2.812 2.73 2.65 2.573 2.498 2.425 2.354 2.285 2.218 2.153 2.089 2.028 1.968 1.911 1.854 1.8 1.747 1.695 1.645 1.597 1.55 1.504 1.459 1.416 1.374 1.334 1.294 1.256 1.219 1.183 1.148 1.114 1.081 1.049 1.018 0.988 0.958 0.93 0.902 0.876 0.85 0.825 0.8 0.776 0.753 0.731 0.709 0.688 0.668 0.648 0.629 0.61 0.592 0.574 0.557

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.994" PeakHeight="110.0" Num="3" Error="0.0">
-26.479 7.968 -1.213
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.994" EndFrequency="12.1" PeakHeight="406.701" Num="5" zHalfNm="333.466" Error="5.593">
-213.708 -49.912 33.161 -21.425 6.417
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="51.234" Depth="0.214"/>
<TopsideChapman PeakHeight="406.701" PeakDensity="1816501.2" PeakScaleHeight="51.83" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
