<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-15 -046 19:00:00.000"
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" >
2026.02.15 (046) 19:00:00</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">
FF202604602151900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.668" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.018" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="210.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="210.000" 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="10.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="477.397" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.782" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="349.754" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="268.703" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.599" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="107.249" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.927" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="58.333" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="140.730" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.150" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="159">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
210.000 210.000 211.667 213.333 215.000 216.667 218.333 220.000 220.000 225.000 226.667 228.333 230.000 230.000 235.000 238.571 242.143 245.714 249.286 252.857 256.429 260.000 265.000 270.000 275.000 275.000 275.000 275.000 275.000 280.000 281.250 282.500 283.750 285.000 290.000 291.250 292.500 293.750 295.000 296.250 297.500 298.750 300.000 300.000 300.000 300.000 300.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 312.500 315.000 315.000 320.000 320.000 321.250 322.500 323.750 325.000 325.000 330.000 330.000 330.000 335.000 337.500 340.000 340.000 340.000 342.500 345.000 345.000 345.000 345.000 348.750 352.500 356.250 360.000 360.000 360.000 360.000 360.000 365.000 365.000 368.333 371.667 375.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 430.000 430.000 440.000 440.000 440.000 440.000 440.000 440.000 445.000 446.667 448.333 450.000 455.000 452.500 450.000 455.000 455.000 460.000 465.000 470.000 472.197 474.647 477.397 480.506 484.047 488.119 492.851 498.416 505.057 513.118 523.110 535.822
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 0 0 0 48 0 54 54 45 0 0 51 48 48 0 0 48 0 0 0 54 57 0 45 0 57 57 54 57 0 0 0 57 51 0 0 0 0 0 0 0 57 57 57 0 45 54 51 0 54 54 51 45 0 51 48 51 48 0 51 0 54 48 54 54 51 54 0 54 0 57 0 57 60 57 54 0 0 0 45 51 57 60 63 60 63 0 0 48 60 63 69 60 66 69 60 66 54 60 66 54 60 66 57 63 66 60 63 0 63 0 54 60 63 66 60 0 63 63 60 63 63 60 63 66 60 0 63 48 0 57 63 63 60 60 0 0 57 45 0 0 51 0 0 51 42 48 0 51 45 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 -0.390625 -0.390625 -0.390625 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 0.390625 0.390625 -0.390625 0.390625 0.390625 -2.734375 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 -1.953125 0.390625 0.390625 0.390625 1.953125 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -1.953125 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 -2.734375 2.734375 -0.390625 0.390625 0.390625 1.953125 -0.390625 2.734375
</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" >
89.584 90.0 95.0 100.0 105.0 110.0 114.218 115.0 118.436 120.0 122.654 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 349.754 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.869 2.408 2.692 2.782 2.66 2.66 2.66 2.705 2.782 2.843 2.972 3.103 3.236 3.371 3.511 3.654 3.801 3.953 4.11 4.271 4.438 4.608 4.784 4.964 5.148 5.336 5.527 5.722 5.92 6.12 6.323 6.528 6.735 6.944 7.154 7.366 7.58 7.795 8.011 8.229 8.449 8.67 8.893 9.117 9.343 9.571 9.8 10.03 10.259 10.485 10.705 10.91 11.085 11.208 11.25 11.25 11.241 11.217 11.179 11.127 11.063 10.987 10.901 10.804 10.698 10.584 10.462 10.334 10.199 10.059 9.914 9.765 9.613 9.457 9.299 9.139 8.977 8.814 8.65 8.485 8.321 8.156 7.992 7.829 7.666 7.505 7.344 7.186 7.029 6.873 6.72 6.568 6.419 6.272 6.127 5.984 5.844 5.706 5.57 5.437 5.306 5.178 5.053 4.929 4.809 4.69 4.575 4.461 4.35 4.242 4.136 4.032 3.93 3.831 3.734 3.64 3.547 3.457 3.369 3.282 3.198 3.116 3.036 2.958 2.882 2.808 2.735 2.664 2.595 2.528 2.462 2.398 2.336 2.275 2.216 2.158 2.102 2.047 1.994 1.942 1.891 1.841 1.793 1.746 1.7 1.656 1.612 1.57 1.529 1.489 1.45 1.412 1.374 1.338 1.303 1.269 1.235 1.203 1.171 1.14 1.11 1.081 1.053 1.025 0.998 0.972 0.946 0.921 0.897 0.873 0.85 0.828 0.806 0.785 0.764 0.744 0.724 0.705 0.686 0.668 0.651 0.633 0.617 0.6 0.585 0.569

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.782" PeakHeight="110.0" Num="3" Error="0.0">
-30.001 12.42 -2.835
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.782" EndFrequency="11.25" PeakHeight="349.754" Num="5" zHalfNm="268.703" Error="3.457">
-178.513 -62.39 18.198 -5.921 1.526
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.654" Depth="0.122"/>
<TopsideChapman PeakHeight="349.754" PeakDensity="1570254.4" PeakScaleHeight="58.333" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
