<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-12 -043 21:40:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, 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" >
2026.02.12 (043) 21:40:00</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">
FF202604302122140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.458" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.487" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="8.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.000" 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="0.644" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="414.661" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="334.955" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.032" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="115.733" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="26.061" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="58.756" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="116.390" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.920" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="138">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.3 2.35 2.4 2.45 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 320.000 320.714 321.429 322.143 322.857 323.571 324.286 325.000 325.000 325.000 325.000 320.000 325.000 326.111 327.222 328.333 329.444 330.556 331.667 332.778 333.889 335.000 335.000 335.000 335.000 335.833 336.667 337.500 338.333 339.167 340.000 340.000 340.000 340.000 340.000 342.143 344.286 346.429 348.571 350.714 352.857 355.000 355.000 355.833 356.667 357.500 358.333 359.167 360.000 360.000 362.500 365.000 365.000 365.000 366.667 368.333 370.000 371.667 373.333 375.000 380.000 380.000 381.786 383.571 385.357 387.143 388.929 390.714 392.500 394.286 396.071 397.857 399.643 401.429 403.214 405.000 410.000 411.000 412.000 413.000 414.000 415.000 415.000 420.000 422.500 425.000 425.000 430.000 430.000 432.500 435.000 437.500 440.000 442.500 445.000 450.000 455.000 455.000 460.000 465.000 465.000 470.000 475.000 475.000 480.000 480.000 480.000 485.000 490.000 495.000 495.000 505.000 510.000 515.000 520.000 520.000 525.000 530.000 535.000 540.000 545.000 555.000 560.000 570.000 575.000 584.843 596.080 609.029
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 63 60 0 0 0 78 0 78 0 0 0 0 0 0 0 0 63 0 57 60 63 63 0 0 0 0 0 0 51 0 51 0 0 0 0 0 0 0 0 66 0 60 51 51 0 0 0 54 0 0 51 54 0 0 0 0 0 57 0 0 63 60 0 0 63 0 0 0 60 69 75 0 0 0 0 0 0 0 0 0 0 0 0 0 48 45 0 60 0 0 72 69 69 0 66 69 66 69 0 66 0 0 0 60 63 60 69 66 63 69 66 57 66 60 69 69 66 69 66 63 60 63 60 57 60 63 66 66 63 66 63 60 60 57 54 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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -0.390625 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.939 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.876 140.0 145.0 150.0 155.0 160.0 161.753 165.0 170.0 175.0 180.0 185.0 187.629 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 414.661 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.427 0.558 0.624 0.644 0.635 0.606 0.556 0.477 0.346 0.313 0.313 0.313 0.313 0.313 0.313 0.313 0.355 0.418 0.482 0.546 0.61 0.644 0.7 0.797 0.886 0.976 1.071 1.171 1.279 1.398 1.529 1.674 1.834 2.012 2.206 2.418 2.645 2.884 3.134 3.39 3.65 3.912 4.175 4.438 4.699 4.959 5.217 5.473 5.726 5.978 6.226 6.472 6.715 6.954 7.189 7.419 7.643 7.86 8.068 8.267 8.452 8.623 8.775 8.905 9.011 9.089 9.136 9.15 9.15 9.143 9.123 9.092 9.051 8.999 8.938 8.868 8.79 8.705 8.613 8.516 8.412 8.304 8.191 8.074 7.954 7.832 7.706 7.579 7.449 7.319 7.187 7.055 6.922 6.789 6.656 6.524 6.392 6.26 6.13 6.0 5.872 5.745 5.619 5.495 5.372 5.251 5.131 5.014 4.898 4.784 4.672 4.562 4.454 4.348 4.244 4.142 4.042 3.944 3.848 3.753 3.661 3.571 3.482 3.396 3.311 3.229 3.148 3.069 2.992 2.916 2.843 2.771 2.7 2.632 2.565 2.5 2.436 2.373 2.313 2.253 2.196 2.139 2.084 2.03 1.978 1.927 1.877 1.829 1.781 1.735 1.69 1.647 1.604 1.562 1.522 1.482 1.444 1.406 1.369 1.334 1.299 1.265 1.232 1.2 1.169 1.138 1.109 1.08 1.051 1.024 0.997 0.971 0.946 0.921 0.897 0.874 0.851 0.828 0.807 0.786 0.765 0.745 0.726 0.707 0.688 0.67

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.644" PeakHeight="110.0" Num="3" Error="0.0">
-24.139 5.739 -0.661
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.644" EndFrequency="9.15" PeakHeight="414.661" Num="5" zHalfNm="334.955" Error="5.668">
-221.388 -11.112 8.193 -6.815 4.09
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.629" Depth="0.331"/>
<TopsideChapman PeakHeight="414.661" PeakDensity="1038740.7" PeakScaleHeight="58.756" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
