<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-19 -050 00:40:00.000"
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 33 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Severe F-spread, F2x cusp not found, 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" >
2026.02.19 (050) 00:40:00</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">
FF202605002190040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.872" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.266" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" 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="0.600" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="420.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="364.287" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="313.625" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.442" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="75.078" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="14.252" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="37.309" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="77.310" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.770" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="109">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 325.000 296.667 268.333 240.000 250.000 250.000 282.500 315.000 325.000 317.500 310.000 310.000 315.000 314.286 313.571 312.857 312.143 311.429 310.714 310.000 310.000 310.000 311.575 313.151 314.726 316.301 317.877 319.452 321.027 322.603 324.178 325.753 327.329 328.904 330.479 332.055 333.630 335.205 336.781 338.356 339.932 341.507 343.082 344.658 346.233 347.808 349.384 350.959 352.534 354.110 355.685 357.260 358.836 360.411 361.986 363.562 365.137 366.712 368.288 369.863 371.438 373.014 374.589 376.164 377.740 379.315 380.890 382.466 384.041 385.616 387.192 388.767 390.342 391.918 393.493 395.068 396.644 398.219 399.795 401.370 402.945 404.521 406.096 407.671 409.247 410.822 412.397 413.973 415.548 417.123 418.699 420.274 421.849 423.425 425.000 435.000 430.000 420.000 420.000 420.000 420.000 425.000 431.667 438.954 447.562 457.886 470.494 486.241
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 0 0 51 63 60 57 54 63 57 63 57 60 54 0 0 0 0 54 51 57 57 60 0 60 60 0 0 0 0 0 0 0 0 0 0 0 0 54 51 0 54 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 48 48 0 51 51 0 54 0 0 0 51 0 0 0 0 0 0 0 0 0 0 51 48 0 51 51 48 0 51 54 48 51 0 51 51 48 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 -0.390625 1.171875 1.953125 0.390625 0.390625 1.171875 0.390625 -0.390625 1.171875 0.390625 0.390625 0.390625 1.171875 1.171875 0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 1.171875 1.171875 -1.171875 1.171875 -2.734375 1.953125 2.734375 1.953125 -0.390625 1.953125 1.953125 1.171875 1.953125 1.953125 1.953125 0.390625 1.171875 1.953125 1.171875 1.171875 1.953125 1.953125 1.171875 -2.734375 1.953125 1.171875 2.734375 -1.953125 0.390625 2.734375 1.171875 1.953125 0.390625 1.953125 1.953125 0.390625 2.734375 2.734375 2.734375 1.953125 0.390625 0.390625 1.953125 0.390625 1.171875 -0.390625 1.953125 1.953125 0.390625 0.390625 0.390625 1.953125 -1.171875 -2.734375 2.734375 -2.734375 -2.734375 -2.734375 1.953125 1.953125 1.953125 1.953125 2.734375 2.734375 1.953125 2.734375 1.953125 1.953125 2.734375 1.953125 2.734375 1.171875 2.734375 1.953125 1.953125 1.953125 1.953125 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="161">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 140.333 145.0 150.0 155.0 160.0 165.0 170.0 170.667 175.0 180.0 185.0 190.0 195.0 200.0 201.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 364.287 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.323 0.297 0.26 0.205 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.247 0.273 0.298 0.324 0.349 0.354 0.451 0.55 0.654 0.77 0.905 1.064 1.251 1.468 1.715 1.985 2.273 2.573 2.879 3.19 3.503 3.819 4.135 4.454 4.774 5.095 5.417 5.74 6.064 6.387 6.708 7.024 7.331 7.623 7.891 8.124 8.305 8.418 8.45 8.45 8.431 8.386 8.317 8.226 8.116 7.989 7.847 7.693 7.529 7.357 7.177 6.992 6.804 6.612 6.42 6.226 6.033 5.841 5.651 5.463 5.278 5.097 4.918 4.744 4.574 4.408 4.246 4.089 3.936 3.788 3.644 3.505 3.37 3.24 3.114 2.993 2.876 2.763 2.654 2.549 2.448 2.35 2.257 2.166 2.08 1.996 1.916 1.839 1.765 1.693 1.625 1.559 1.496 1.435 1.377 1.321 1.267 1.216 1.166 1.119 1.073 1.029 0.987 0.947 0.908 0.871 0.836 0.801 0.769 0.737 0.707 0.678 0.65 0.624 0.598 0.574 0.55 0.528 0.506 0.485 0.466 0.446 0.428 0.411 0.394 0.378 0.362 0.347 0.333 0.319 0.306 0.294 0.282 0.27 0.259 0.248 0.238 0.229 0.219 0.21 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.45" PeakHeight="364.287" Num="5" zHalfNm="313.625" Error="5.27">
-159.364 -12.313 12.34 -7.357 3.407
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="91.0" Depth="0.154"/>
<TopsideChapman PeakHeight="364.287" PeakDensity="885887.1" PeakScaleHeight="37.309" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
