<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-17 -048 21:00:00.000"
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 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) 21:00:00</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">
FF202604802172100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.345" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.846" 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="11.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="602.221" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.435" 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="429.881" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="333.584" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.236" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="137.191" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.362" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="67.083" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="156.180" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.390" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="180">
<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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 270.000 270.000 270.000 270.000 271.667 273.333 275.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 285.000 285.000 290.000 291.250 292.500 293.750 295.000 295.000 295.000 296.667 298.333 300.000 305.000 306.000 307.000 308.000 309.000 310.000 312.500 315.000 315.000 315.000 315.000 315.000 315.000 318.000 321.000 324.000 327.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 340.000 341.667 343.333 345.000 350.000 350.000 350.000 355.000 356.667 358.333 360.000 365.000 366.667 368.333 370.000 370.000 375.000 375.000 375.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 410.000 410.000 410.000 415.000 420.000 420.000 422.500 425.000 427.500 430.000 435.000 435.000 440.000 440.000 445.000 445.000 445.000 450.000 455.000 455.000 455.000 455.000 460.000 460.000 465.000 465.000 465.000 470.000 470.000 475.000 475.000 480.000 480.000 480.000 485.000 490.000 490.000 490.000 495.000 495.000 500.000 500.000 502.500 505.000 510.000 510.000 512.500 515.000 520.000 520.000 520.000 521.667 523.333 525.000 528.333 531.667 535.000 535.000 540.000 542.500 545.000 547.500 550.000 550.000 555.000 560.000 560.000 561.667 563.333 565.000 570.000 571.667 573.333 575.000 577.500 580.000 585.000 590.000 591.410 593.005 594.824 596.917 599.352 602.221 605.649 609.819 615.000 621.611 630.339
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 51 60 0 63 0 0 63 66 66 69 69 69 69 66 69 72 72 72 69 69 72 72 72 69 0 60 66 0 0 0 63 60 66 0 0 66 57 0 0 51 0 57 0 54 60 60 63 57 0 0 0 60 0 57 0 66 66 0 66 66 66 0 0 69 60 66 69 63 0 0 66 54 0 48 57 63 54 60 66 60 51 60 66 60 66 60 66 63 66 66 54 66 69 66 60 69 0 69 0 69 63 69 63 69 60 66 69 66 51 63 66 69 66 72 63 48 69 66 69 63 66 60 66 69 66 54 63 66 63 69 60 66 60 66 57 60 54 63 54 0 63 0 0 57 0 0 60 57 57 0 0 0 54 54 0 42 51 0 0 54 51 0 0 54 0 54 0 42 51 48 48 0 48 42 48 45 45 0 42
</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 -1.171875 -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 -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 -1.171875 -0.390625 -1.171875 -1.171875 1.953125 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -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 2.734375 -1.171875 -2.734375 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -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 -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 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -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 -1.171875 1.953125 -1.171875 -1.171875
</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" >
89.965 90.0 95.0 100.0 105.0 110.0 115.0 120.0 121.755 125.0 130.0 133.509 135.0 140.0 145.0 145.264 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 429.881 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.203 0.959 1.243 1.389 1.435 1.409 1.328 1.285 1.285 1.285 1.285 1.304 1.368 1.432 1.435 1.514 1.6 1.691 1.786 1.889 2.0 2.12 2.252 2.398 2.558 2.734 2.927 3.134 3.354 3.581 3.814 4.046 4.277 4.504 4.726 4.944 5.156 5.363 5.566 5.765 5.961 6.153 6.342 6.529 6.713 6.896 7.077 7.257 7.436 7.614 7.792 7.969 8.147 8.324 8.502 8.681 8.86 9.04 9.222 9.405 9.59 9.777 9.966 10.157 10.35 10.545 10.74 10.933 11.118 11.283 11.405 11.45 11.45 11.444 11.425 11.396 11.356 11.306 11.246 11.178 11.101 11.017 10.925 10.827 10.723 10.613 10.498 10.378 10.255 10.127 9.997 9.863 9.727 9.588 9.448 9.306 9.163 9.019 8.874 8.728 8.583 8.437 8.291 8.146 8.001 7.857 7.714 7.572 7.43 7.29 7.151 7.014 6.878 6.743 6.61 6.479 6.349 6.221 6.095 5.97 5.848 5.727 5.608 5.491 5.376 5.263 5.152 5.042 4.935 4.829 4.726 4.624 4.524 4.426 4.33 4.235 4.143 4.052 3.963 3.876 3.791 3.707 3.625 3.545 3.466 3.389 3.313 3.239 3.167 3.096 3.027 2.959 2.892 2.827 2.764 2.701 2.64 2.581 2.522 2.465 2.41 2.355 2.302 2.249 2.198 2.148 2.1 2.052 2.005 1.959 1.915 1.871 1.829 1.787 1.746 1.706 1.667 1.629 1.592 1.555 1.52 1.485 1.451 1.418 1.385 1.354 1.323

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.435" PeakHeight="110.0" Num="3" Error="0.0">
-27.968 9.691 -1.758
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.435" EndFrequency="11.45" PeakHeight="429.881" Num="5" zHalfNm="333.584" Error="5.833">
-245.981 -62.353 42.654 -25.112 6.175
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="35.264" Depth="0.15"/>
<TopsideChapman PeakHeight="429.881" PeakDensity="1626581.9" PeakScaleHeight="67.083" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
