<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-19 -050 13:40:00.000"
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: 95% PACIFIC flags: Multiple candidates for F2x cusp</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) 13:40:00</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">
FF202605002191340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.520" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.947" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" 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="9.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="490.000" 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="3.309" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.322" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="356.095" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="240.205" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.183" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="150.026" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.304" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="84.283" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="186.710" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.430" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="106">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 225.000 230.000 235.000 235.000 242.727 250.455 258.182 265.909 273.636 281.364 289.091 296.818 304.545 312.273 320.000 325.000 330.000 330.000 331.667 333.333 335.000 335.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 400.000 400.000 405.000 405.000 415.000 420.000 420.000 425.000 430.000 430.000 440.000 445.000 450.000 450.000 455.000 460.000 460.000 465.000 465.000 475.000 475.000 480.000 485.000 490.000 490.000 500.000 500.000 505.000 510.000 515.000 520.000 530.000 535.000 543.753 553.738 565.236 578.617 594.387 613.246 636.203
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 45 0 48 51 0 0 0 48 0 0 0 0 0 0 51 51 48 51 0 0 54 54 54 0 54 51 60 54 0 48 51 60 51 48 0 54 0 48 54 60 60 66 75 78 75 72 75 75 72 72 72 63 57 63 63 69 69 69 60 66 63 69 66 69 69 63 69 69 69 66 63 63 66 66 66 66 66 63 69 69 66 63 66 66 66 66 63 63 63 63 57 63 63 63 57 57 57 48 54 54 48 0 0 0 0
</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 2.734375 0.390625 0.390625 1.171875 1.953125 -2.734375 1.953125 2.734375 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 -1.171875 2.734375 -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" >
89.495 90.0 95.0 100.0 105.0 110.0 111.885 113.771 115.0 115.656 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 356.095 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.226 2.864 3.201 3.309 3.186 3.186 3.266 3.309 3.44 3.582 3.718 3.853 3.986 4.119 4.254 4.39 4.528 4.668 4.81 4.955 5.103 5.252 5.404 5.558 5.714 5.872 6.03 6.19 6.35 6.511 6.672 6.833 6.994 7.154 7.314 7.473 7.631 7.787 7.943 8.097 8.25 8.401 8.55 8.697 8.841 8.982 9.118 9.25 9.375 9.493 9.601 9.697 9.778 9.84 9.882 9.899 9.9 9.898 9.889 9.875 9.854 9.827 9.795 9.757 9.714 9.667 9.615 9.558 9.498 9.434 9.366 9.295 9.221 9.144 9.064 8.981 8.897 8.81 8.721 8.631 8.539 8.445 8.351 8.255 8.158 8.06 7.962 7.863 7.764 7.664 7.564 7.464 7.363 7.263 7.163 7.063 6.963 6.864 6.765 6.666 6.568 6.471 6.374 6.278 6.182 6.088 5.994 5.901 5.808 5.717 5.626 5.537 5.448 5.36 5.273 5.188 5.103 5.019 4.936 4.854 4.774 4.694 4.615 4.538 4.461 4.386 4.311 4.238 4.166 4.094 4.024 3.955 3.887 3.819 3.753 3.688 3.624 3.561 3.498 3.437 3.377 3.318 3.259 3.202 3.145 3.09 3.035 2.981 2.928 2.876 2.825 2.775 2.725 2.677 2.629 2.582 2.535 2.49 2.445 2.401 2.358 2.316 2.274 2.233 2.193 2.153 2.114 2.076 2.039 2.002 1.966 1.93 1.895 1.861 1.827 1.794 1.761 1.729 1.698 1.667 1.637 1.607 1.578 1.549 1.521 1.493

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.309" PeakHeight="110.0" Num="3" Error="0.0">
-30.442 13.064 -3.127
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.309" EndFrequency="9.9" PeakHeight="356.095" Num="5" zHalfNm="240.205" Error="7.098">
-208.885 -42.565 13.098 -3.743 1.656
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.656" Depth="0.123"/>
<TopsideChapman PeakHeight="356.095" PeakDensity="1216005.0" PeakScaleHeight="84.283" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
