<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-14 -045 16:00:00.000"
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 1 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" >
2026.02.14 (045) 16:00:00</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">
FF202604502141600009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="10.425" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.323" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.485" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.847" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="175.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="322.857" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="500.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.366" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.349" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="367.971" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="182.059" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="250.846" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.748" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="140.361" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="74.112" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.381" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="86.148" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="188.560" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.430" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.390" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="102">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
322.857 325.714 328.571 331.429 334.286 337.143 340.000 335.000 335.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 402.500 405.000 405.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 465.000 465.000 470.000 470.000 475.000 480.000 480.000 485.000 485.000 490.000 495.000 495.000 500.000 500.000 505.000 510.000 515.000 520.000 530.000 535.000 542.500 550.000 555.000 565.000 575.000 586.658 599.980 615.349 633.276 654.458
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 51 0 51 54 51 60 57 57 57 54 54 54 0 57 57 60 60 60 60 57 57 57 57 57 57 54 0 48 51 54 48 0 48 54 57 60 60 66 57 63 66 57 63 57 60 54 60 48 60 69 63 69 63 54 66 57 66 60 66 66 66 69 66 66 63 60 63 57 51 60 51 60 51 45 54 51 57 54 48 54 54 51 48 48 48 45 45 42 0 45 48 48 51 51 51 51 45 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -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 -2.734375 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="20">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
175.000 175.000 184.167 193.333 202.500 211.667 220.833 230.000 235.000 242.727 250.455 258.182 265.909 273.636 281.364 289.091 296.818 304.545 312.273 320.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 0 0 0 0 0 45 45 48 0 0 0 0 0 0 0 0 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 2.734375 -1.171875 -1.953125 0.390625 -2.734375 -0.390625 0.390625 -0.390625 -1.953125 2.734375 -0.390625 2.734375 -1.171875 2.734375 -0.390625 0.390625 1.171875 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.488 90.0 95.0 100.0 105.0 110.0 111.651 113.301 114.952 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.059 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 367.971 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.265 2.913 3.256 3.366 3.243 3.243 3.366 3.368 3.568 3.811 4.115 4.361 4.533 4.667 4.779 4.879 4.97 5.057 5.141 5.226 5.307 5.323 5.387 5.498 5.614 5.736 5.864 5.999 6.142 6.293 6.452 6.618 6.792 6.972 7.155 7.34 7.525 7.708 7.887 8.062 8.232 8.396 8.556 8.71 8.86 9.005 9.146 9.283 9.417 9.547 9.674 9.797 9.915 10.029 10.136 10.234 10.318 10.382 10.419 10.425 10.424 10.418 10.406 10.387 10.362 10.331 10.295 10.254 10.208 10.157 10.101 10.042 9.978 9.911 9.84 9.765 9.688 9.608 9.525 9.44 9.352 9.262 9.171 9.077 8.982 8.886 8.788 8.69 8.59 8.489 8.388 8.286 8.183 8.081 7.978 7.874 7.771 7.668 7.565 7.462 7.359 7.256 7.154 7.053 6.951 6.851 6.751 6.651 6.553 6.455 6.358 6.261 6.166 6.071 5.977 5.884 5.792 5.701 5.611 5.522 5.434 5.347 5.261 5.176 5.092 5.009 4.927 4.847 4.767 4.688 4.611 4.534 4.458 4.384 4.31 4.238 4.167 4.096 4.027 3.959 3.892 3.825 3.76 3.696 3.632 3.57 3.509 3.448 3.389 3.33 3.273 3.216 3.16 3.106 3.052 2.998 2.946 2.895 2.844 2.795 2.746 2.698 2.65 2.604 2.558 2.513 2.469 2.425 2.383 2.341 2.299 2.259 2.219 2.18 2.141 2.103 2.066 2.029 1.993 1.958 1.923 1.889 1.856 1.823 1.79 1.758 1.727

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.366" PeakHeight="110.0" Num="3" Error="0.0">
-30.483 13.126 -3.155
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.366" EndFrequency="5.323" PeakHeight="182.059" Num="5" Error="0.0">
-59.684 -14.407 12.661 -7.466 1.789
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.323" EndFrequency="10.425" PeakHeight="367.971" Num="5" zHalfNm="250.846" Error="5.04">
-154.23 -35.895 9.909 -7.164 1.468
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.952" Depth="0.123"/>
<TopsideChapman PeakHeight="367.971" PeakDensity="1348394.9" PeakScaleHeight="86.148" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
