<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-17 -048 20:40:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: One of F2 cusps was derived from the other</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" >
2026.02.17 (048) 20:40:00</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">
FF202604802172040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.792" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.755" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="427.481" 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="1.807" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="335.352" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="257.871" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.323" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="106.514" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="20.549" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="57.174" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="117.290" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.680" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="114">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 255.000 252.500 250.000 255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 262.500 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 282.500 285.000 286.250 287.500 288.750 290.000 285.000 288.333 291.667 295.000 295.000 295.000 297.000 299.000 301.000 303.000 305.000 310.000 310.000 310.000 312.500 315.000 315.000 315.000 315.000 317.500 320.000 322.500 325.000 325.833 326.667 327.500 328.333 329.167 330.000 335.000 340.000 340.000 342.500 345.000 345.000 346.667 348.333 350.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 405.000 410.000 415.000 415.000 415.000 420.000 425.000 427.481 430.379 433.809 437.932 442.982 449.310 457.471 468.400 483.789 507.070 546.405
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 0 48 60 0 0 63 63 63 66 66 66 0 66 66 69 66 69 0 69 69 69 69 69 66 66 0 63 0 0 0 0 0 0 69 0 0 66 66 63 0 0 0 0 66 54 60 66 0 60 63 54 66 0 66 60 66 0 0 0 0 0 66 57 63 66 0 63 69 0 0 69 63 66 69 63 0 66 69 60 66 69 63 69 63 69 63 69 63 69 63 66 63 69 66 66 0 57 66 69 69 60 69 60 48 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -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 -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 -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 -1.171875 2.734375 -1.171875 -1.953125 -1.171875 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.819 90.0 95.0 100.0 105.0 110.0 115.0 119.31 120.0 125.0 128.621 130.0 135.0 137.931 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 335.352 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.216 1.21 1.565 1.749 1.807 1.768 1.67 1.67 1.67 1.67 1.69 1.764 1.807 1.849 1.949 2.049 2.153 2.26 2.372 2.489 2.613 2.744 2.883 3.032 3.189 3.357 3.534 3.721 3.916 4.12 4.329 4.544 4.762 4.981 5.201 5.421 5.639 5.855 6.068 6.278 6.484 6.686 6.883 7.074 7.257 7.432 7.596 7.746 7.879 7.99 8.075 8.13 8.15 8.15 8.145 8.128 8.101 8.063 8.016 7.96 7.895 7.824 7.745 7.66 7.57 7.475 7.375 7.27 7.163 7.052 6.939 6.823 6.706 6.587 6.467 6.346 6.225 6.103 5.982 5.86 5.739 5.619 5.499 5.38 5.262 5.145 5.03 4.916 4.803 4.692 4.583 4.475 4.369 4.265 4.162 4.062 3.963 3.866 3.771 3.677 3.586 3.496 3.409 3.323 3.239 3.157 3.077 2.998 2.921 2.846 2.773 2.701 2.632 2.563 2.497 2.432 2.368 2.306 2.246 2.187 2.13 2.074 2.019 1.966 1.914 1.864 1.814 1.766 1.719 1.674 1.629 1.586 1.544 1.503 1.463 1.424 1.386 1.349 1.313 1.278 1.244 1.21 1.178 1.146 1.116 1.086 1.057 1.028 1.001 0.974 0.948 0.923 0.898 0.874 0.85 0.827 0.805 0.784 0.762 0.742 0.722 0.703 0.684 0.665 0.647 0.63 0.613 0.597 0.581 0.565 0.55 0.535 0.521 0.506 0.493 0.48 0.467 0.454 0.442 0.43 0.418 0.407 0.396 0.385 0.375 0.365 0.355

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.807" PeakHeight="110.0" Num="3" Error="0.0">
-28.747 10.69 -2.124
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.807" EndFrequency="8.15" PeakHeight="335.352" Num="5" zHalfNm="257.871" Error="2.167">
-170.441 -29.239 4.376 -3.916 1.799
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="27.931" Depth="0.137"/>
<TopsideChapman PeakHeight="335.352" PeakDensity="824100.5" PeakScaleHeight="57.174" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
