<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-17 -048 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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2x cusp, F2 cusps do not match</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) 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">
FF202604802171900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.697" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.825" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.850" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="105.000" Name="h`Es" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" 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="2.782" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="346.481" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="267.294" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.599" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.750" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="105.207" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.585" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="57.369" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="148.610" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="106">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.55 11.6 11.65 11.7 11.75 11.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
345.000 345.000 346.250 347.500 348.750 350.000 351.250 352.500 353.750 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 367.000 369.000 371.000 373.000 375.000 375.000 375.000 377.500 380.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 390.000 390.000 392.000 394.000 396.000 398.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 427.500 430.000 430.000 430.000 430.000 435.000 437.500 440.000 435.000 440.000 442.500 445.000 445.000 445.000 446.250 447.500 448.750 450.000 450.000 455.000 460.000 460.000 462.500 465.000 465.000 465.000 470.000 475.000 475.000 480.000 484.311 489.463 495.729 503.516 513.451 526.567
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 0 0 0 0 0 0 0 66 69 63 66 66 66 63 0 69 0 0 0 0 66 72 72 0 66 72 69 69 72 72 66 0 0 72 72 51 0 0 0 0 66 60 66 66 66 63 66 0 63 60 60 66 66 69 69 69 69 69 66 66 60 63 60 54 51 60 60 54 0 63 60 57 54 54 0 51 57 57 0 54 0 57 0 0 0 48 0 0 51 54 0 57 0 0 54 51 0 0 51 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 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 -1.953125 -1.953125 -1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="63">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 115.000 117.500 120.000 115.000 116.000 117.000 118.000 119.000 120.000 120.000 120.000 115.000 110.000 110.000 110.000 120.000 110.000 110.000 110.000 110.000 115.000 115.000 115.000 115.000 110.000 110.000 120.000 115.000 112.500 110.000 110.000 110.000 109.773 109.545 109.318 109.091 108.864 108.636 108.409 108.182 107.955 107.727 107.500 107.273 107.045 106.818 106.591 106.364 106.136 105.909 105.682 105.455 105.227 105.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 0 48 51 0 0 0 0 57 54 57 0 48 54 63 54 60 57 51 54 63 0 0 48 57 54 45 0 0 63 63 69 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 51 0 48 0 54 57 63 0 60 0 0 60 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 -2.734375 -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 -1.171875 0.390625 -0.390625 -0.390625 -0.390625 -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" >
89.584 90.0 95.0 100.0 105.0 110.0 114.215 115.0 118.43 120.0 122.645 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 346.481 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 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 2.878 3.096 3.322 3.546 3.765 3.975 4.179 4.376 4.568 4.756 4.941 5.122 5.302 5.48 5.657 5.834 6.011 6.188 6.366 6.545 6.725 6.906 7.09 7.276 7.464 7.656 7.85 8.048 8.25 8.456 8.666 8.882 9.103 9.329 9.561 9.799 10.044 10.295 10.55 10.809 11.066 11.314 11.536 11.708 11.795 11.8 11.796 11.775 11.739 11.688 11.623 11.545 11.456 11.355 11.244 11.124 10.995 10.859 10.717 10.568 10.414 10.256 10.093 9.927 9.759 9.588 9.415 9.241 9.066 8.891 8.715 8.54 8.365 8.191 8.018 7.846 7.675 7.506 7.339 7.174 7.01 6.849 6.691 6.534 6.38 6.229 6.08 5.934 5.79 5.649 5.511 5.375 5.243 5.112 4.985 4.86 4.738 4.618 4.501 4.387 4.275 4.166 4.059 3.955 3.853 3.753 3.656 3.562 3.469 3.379 3.291 3.205 3.121 3.039 2.96 2.882 2.806 2.732 2.66 2.59 2.522 2.455 2.39 2.327 2.265 2.205 2.147 2.09 2.034 1.98 1.927 1.876 1.826 1.777 1.73 1.684 1.639 1.595 1.553 1.511 1.471 1.432 1.393 1.356 1.32 1.285 1.25 1.217 1.184 1.152 1.122 1.092 1.062 1.034 1.006 0.979 0.953 0.927 0.903 0.878 0.855 0.832 0.81 0.788 0.767 0.746 0.726 0.707 0.688 0.669 0.651 0.634 0.617 0.6 0.584 0.568 0.553

</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="11.8" PeakHeight="346.481" Num="5" zHalfNm="267.294" Error="2.59">
-181.923 -66.549 28.142 -2.23 -1.276
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.645" Depth="0.122"/>
<TopsideChapman PeakHeight="346.481" PeakDensity="1727543.4" PeakScaleHeight="57.369" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
