<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-13 -044 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: 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" >
2026.02.13 (044) 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">
FF202604402131900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.755" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.681" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" 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="11.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.781" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="343.394" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="275.800" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.598" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="90.150" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.326" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="50.127" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="126.100" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.010" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="157">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 220.000 220.000 224.167 228.333 232.500 236.667 240.833 245.000 246.667 248.333 250.000 255.000 260.000 265.000 265.000 265.000 275.000 275.000 280.000 280.000 285.000 290.000 295.000 295.000 298.333 301.667 305.000 305.000 306.000 307.000 308.000 309.000 310.000 315.000 315.000 320.000 322.500 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 327.500 330.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 342.500 345.000 345.000 347.500 350.000 350.000 350.000 351.667 353.333 355.000 360.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 370.000 372.500 375.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 386.250 387.500 388.750 390.000 395.000 395.000 395.000 395.000 397.500 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 410.000 410.000 412.500 415.000 415.000 415.000 415.000 415.000 416.667 418.333 420.000 425.000 427.500 430.000 431.250 432.500 433.750 435.000 435.000 440.000 440.000 442.500 445.000 445.000 447.500 450.000 450.000 455.000 460.000 460.000 465.000 465.000 469.696 475.531 482.976 492.804 506.380
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 51 0 48 0 0 0 45 0 0 60 60 54 51 60 60 57 60 60 54 57 0 57 63 0 0 54 60 0 0 54 0 51 63 60 0 0 0 0 0 69 69 69 66 60 0 66 66 0 60 66 0 66 0 0 66 0 63 0 66 51 0 63 60 0 69 66 63 0 0 69 63 66 66 66 0 66 69 69 63 0 51 69 69 72 0 0 66 69 57 60 66 69 69 66 66 57 0 0 0 57 69 69 66 57 0 69 66 66 63 69 0 69 0 66 66 0 66 66 63 63 0 63 0 63 63 57 0 0 57 54 0 45 0 0 0 45 51 42 48 0 45 48 0 48 48 51 48 51 51 48 48 42 42 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 1.171875 -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 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 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 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 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 1.953125 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 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" >
89.584 90.0 95.0 100.0 105.0 110.0 114.223 115.0 118.446 120.0 122.669 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 343.394 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.869 2.407 2.691 2.781 2.659 2.659 2.659 2.704 2.781 2.838 2.961 3.086 3.214 3.344 3.476 3.611 3.749 3.891 4.035 4.183 4.335 4.491 4.65 4.814 4.982 5.154 5.33 5.511 5.697 5.888 6.083 6.284 6.49 6.701 6.918 7.14 7.369 7.603 7.844 8.092 8.346 8.606 8.874 9.148 9.428 9.715 10.006 10.3 10.591 10.872 11.13 11.341 11.472 11.5 11.499 11.481 11.443 11.385 11.31 11.219 11.113 10.994 10.863 10.72 10.569 10.408 10.24 10.066 9.887 9.703 9.515 9.324 9.131 8.937 8.741 8.545 8.35 8.155 7.96 7.767 7.576 7.387 7.199 7.015 6.833 6.653 6.477 6.303 6.133 5.966 5.802 5.642 5.485 5.331 5.181 5.034 4.891 4.751 4.615 4.482 4.352 4.226 4.102 3.982 3.865 3.752 3.641 3.533 3.429 3.327 3.228 3.132 3.038 2.947 2.859 2.773 2.69 2.609 2.53 2.454 2.38 2.308 2.238 2.17 2.105 2.041 1.979 1.919 1.86 1.804 1.749 1.696 1.644 1.594 1.545 1.498 1.453 1.408 1.365 1.324 1.283 1.244 1.206 1.169 1.133 1.099 1.065 1.032 1.001 0.97 0.941 0.912 0.884 0.857 0.831 0.805 0.78 0.756 0.733 0.711 0.689 0.668 0.647 0.628 0.608 0.59 0.572 0.554 0.537 0.521 0.505 0.489 0.474 0.46 0.446 0.432 0.419 0.406 0.393 0.381 0.37 0.358 0.347 0.337 0.326 0.316

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.781" PeakHeight="110.0" Num="3" Error="0.0">
-30.0 12.419 -2.835
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.781" EndFrequency="11.5" PeakHeight="343.394" Num="5" zHalfNm="275.8" Error="3.371">
-164.099 -67.884 12.315 -1.391 0.334
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.669" Depth="0.122"/>
<TopsideChapman PeakHeight="343.394" PeakDensity="1640818.9" PeakScaleHeight="50.127" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
